In 1923, Ohio renumbered almost all of its state highways in order to simplify the system.[1]
| width=20% | Old | width=20% | New | Now | From | To |
|---|---|---|---|---|---|---|
| US 40 | Indiana | Pennsylvania | ||||
| US 20 | Cleveland | Pennsylvania | ||||
| US 6 | Cleveland | Sandusky | ||||
| US 23 | Columbus | Waldo | ||||
| SR 98 | Waldo | Bucyrus | ||||
| SR 4 | Bucyrus | Sandusky | ||||
| US 23 | Portsmouth | Columbus | ||||
| SR 142, US 42 | West Jefferson | Sharonville | ||||
| US 52, SR 7 | Cincinnati | Pomeroy | ||||
| SR 124 | Hockingport | Little Hocking | ||||
| SR 7 | Little Hocking | East Liverpool | ||||
| SR 39 | East Liverpool | Pennsylvania | ||||
| US 50, SR 28 | Cincinnati | Chillicothe | ||||
| US 50 | Milford | Hillsboro | ||||
| SR 3/US 22 | Cincinnati | Washington Court House | ||||
| US 22 | Washington Court House | Zanesville | ||||
| US 25 (former) | Toledo | Michigan | ||||
| SR 14 | Cleveland | Salem | ||||
| SR 45 | Salem | Lisbon | ||||
| US 30 | Lisbon | East Liverpool | ||||
| SR 7 | Hubbard | Conneaut | ||||
| SR 289 | Youngstown | Pennsylvania | ||||
| US 322 | Cleveland | Pennsylvania | ||||
| SR 8 | Akron | Cleveland | ||||
| SR 21 | Cleveland | Massillon | ||||
| SR 18 (former) | Akron (east of) | Youngstown | ||||
| US 42 | Cincinnati | Sharonville | ||||
| US 25 (former) | Sharonville | Franklin | ||||
| US 25 (former) | Franklin | Dayton | ||||
| SR 2 | Toledo | Wauseon | ||||
| US 20, SR 120 | Toledo | Indiana | ||||
| US 25 (former) | Lima | Findlay | ||||
| SR 12, US 6 | Findlay | Sandusky | ||||
| US 62 | Columbus | Millersburg | ||||
| SR 3 | Columbus | Wooster | ||||
| SR 3, US 42 | Cleveland | Wooster | ||||
| US 22 | Steubenville | Cambridge | ||||
| SR 201 | Dayton | Brandt | ||||
| SR 235 | East of Brandt | Lakeview | ||||
| US 35 | Dayton | Eaton | ||||
| SR 122 | Eaton | Indiana | ||||
| US 35 | Dayton | Chillicothe | ||||
| SR 125 | Cincinnati | West Union | ||||
| US 20 | Cleveland | Elyria | ||||
| SR 94, SR 3 | Cleveland | Medina | ||||
| US 422 | Cleveland | Chagrin Falls (west of) | ||||
| SR 87 | Chagrin Falls (west of) | Burton | ||||
| US 6 | Euclid | Chardon | ||||
| US 422 | Chagrin Falls (west of) | Parkman | ||||
| SR 88 | Parkman | Pennsylvania | ||||
| SR 82 | Twinsburg | Elyria (south of) | ||||
| SR 237, Eastland Road, Fowles Road | Rocky River | Berea (east of) | ||||
| SR 264, US 50 | Cincinnati | Indiana | ||||
| US 127 | Cincinnati | Hamilton | ||||
| US 27, SR 126 | Cincinnati | Indiana | ||||
| SR 32 | Cincinnati | Batavia | ||||
| US 52 | Cincinnati | Indiana | ||||
| SR 4 | Carthage | Hamilton | ||||
| SR 128 | Hamilton | Cleves | ||||
| SR 126 | Dunlap | Springdale | ||||
| SR 126 | Glendale | Milford | ||||
| SR 16 | Columbus | Newark | ||||
| US 33 | Columbus | Marysville | ||||
| US 33 | Columbus | Lancaster | ||||
| SR 3/US 62 | Columbus | Washington Court House | ||||
| US 24 | Toledo | Napoleon | ||||
| SR 51 | Toledo | Southeast of Woodville | ||||
| SR 65 | Toledo | Perrysburg | ||||
| SR 65 | Perrysburg | Grand Rapids | ||||
| SR 51 | Toledo | Michigan | ||||
| SR 246, Secor Road | Toledo | Michigan | ||||
| SR 2 | Toledo | Bono | ||||
| US 20, Perrysburg Holland Road | Perrysburg | Holland | ||||
| US 20, Holland Sylvania Road | Southeast of Holland | Sylvania | ||||
| SR 64 | Waterville | Swanton | ||||
| SR 4 | Dayton | Springfield | ||||
| US 25 (former) | Dayton | Troy | ||||
| SR 49 | Dayton | Greenville | ||||
| SR 48 | Dayton | Covington (north of) | ||||
| SR 48 | Dayton | Lebanon | ||||
| SR 4 | Dayton | Germantown | ||||
| SR 8 (former) | Akron | Canton | ||||
| US 62 | Canton | Louisville (north of) | ||||
| US 62, SR 193 (former) | Louisville (north of) | Alliance | ||||
| SR 172 | Canton | Massillon | ||||
| US 30, SR 172 | Massillon | Wooster | ||||
| SR 800 | Canton | New Philadelphia | ||||
| SR 93, SR 236 | Akron | Massillon | ||||
| SR 172 | Canton | Osnaburg | ||||
| SR 172 | Osnaburg | New Franklin | ||||
| SR 153 | Canton | Louisville | ||||
| SR 44 | Ravenna | Louisville (north of) | ||||
| SR 44 | Louisville (north of) | Louisville | ||||
| SR 43 | Canton | Waynesburg | ||||
| SR 171 | Waynesburg | Carrollton | ||||
| SR 43 | Carrollton | Steubenville | ||||
| SR 225 | Alliance | East of Atwater Center | ||||
| SR 225 (former) | East of Atwater Center | Yale | ||||
| SR 21 | Massillon | Northwest of Strasburg | ||||
| SR 183 | Alliance | Minerva | ||||
| US 62 | Navarre | Berlin | ||||
| US 422 | Youngstown | Girard | ||||
| US 422 | Girard | Warren | ||||
| US 62 | Youngstown | Salem | ||||
| SR 164, SR 7 | Youngstown | Lisbon | ||||
| SR 170, SR 617 | Pennsylvania | Youngstown | ||||
| US 62, SR 173 (former) | Alliance | Salem | ||||
| US 422 | Youngstown | Pennsylvania | ||||
| SR 14 | Salem | Unity | ||||
| SR 14 | Unity | Pennsylvania | ||||
| US 224 | Akron | Canfield | ||||
| SR 169 | Girard | Warren | ||||
| SR 165 | North Lima | Unity | ||||
| SR 165 | Unity | East Palestine | ||||
| SR 174 | Chagrin Falls | Willoughby | ||||
| SR 91 | Cuyahoga Falls | Solon | ||||
| SR 174 (former) | Solon | Chagrin Falls | ||||
| SR 59 | Akron | Cuyahoga Falls | ||||
| SR 59 | Cuyahoga Falls | Kent | ||||
| SR 261 | Akron | Kent | ||||
| SR 18 | Akron | Medina | ||||
| SR 585 | Akron | Wooster | ||||
| US 224 | Barberton | Chicago Junction | ||||
| SR 176 (former) | Northwest of Akron | Ghent | ||||
| SR 214 (former) | St. Clairsville (east of) | Bellaire | ||||
| US 250 | Bridgeport | Cadiz | ||||
| SR 800 | Barnesville | Hendrysburg | ||||
| SR 9 | Cadiz | St. Clairsville | ||||
| SR 149 | New Athens | Morristown | ||||
| SR 800 | Barnesville | Woodsfield | ||||
| SR 148 | Barnesville | Powhatan Point | ||||
| SR 9 | St. Clairsville | Armstrongs Mills | ||||
| SR 265 | Cambridge | Barnesville | ||||
| SR 145 | Malaga | Alledonia | ||||
| SR 423 | Marion | Waldo | ||||
| SR 4 | Marion | Bucyrus | ||||
| SR 95 | Marion | Mount Gilead | ||||
| SR 309 | Kenton | Marion | ||||
| US 23, SR 199, SR 423 | Marion | Upper Sandusky | ||||
| SR 309 | Marion | Galion | ||||
| SR 4 | Marysville | Marion | ||||
| SR 203 | Delaware | North of Prospect | ||||
| SR 37 | South of Richwood | LaRue | ||||
| SR 37 | LaRue | Marseilles | ||||
| SR 125 | West Union | Portsmouth (west of) | ||||
| SR 41, SR 136 | West Union | Manchester | ||||
| SR 247 | West Union | Wrightsville | ||||
| SR 247, SR 785 | West Union | Belfast | ||||
| SR 73 | Hillsboro | Portsmouth (north of) | ||||
| SR 41 | West Union | Bainbridge | ||||
| SR 32 | Batavia | South of Seaman | ||||
| US 25 (former) | Lima | Wapakoneta | ||||
| SR 309 | Lima | Delphos | ||||
| SR 309 | Lima | Kenton | ||||
| SR 65 | Lima | Ottawa | ||||
| SR 117 | Lima | North of Huntsville | ||||
| US 33 | North of Huntsville | Bellefontaine | ||||
| SR 66 | Delphos | St. Marys | ||||
| SR 117 | Lima | Conant | ||||
| SR 117 | Conant | Spencerville | ||||
| SR 12 | Findlay | Vaughnsville | ||||
| SR 12 (former) | Vaughnsville | Gomer | ||||
| US 30 | Gomer | Delphos | ||||
| SR 115 | Kieferville | Lima | ||||
| SR 116, SR 117 | Van Wert | Spencerville | ||||
| SR 198 (former) | Delphos (south of) | Conant | ||||
| SR 198 | Conant | Wapakoneta | ||||
| SR 190 | Delphos | Fort Jennings | ||||
| SR 190 | Fort Jennings | West of Kalida | ||||
| SR 103 | Bluffton | Carey | ||||
| US 42 | Ashland | Medina | ||||
| US 42 | Mansfield | Ashland | ||||
| US 250 | Ashland | Wooster | ||||
| SR 60/US 250 | Ashland | Savannah | ||||
| US 250 | Savannah | Fitchville | ||||
| SR 13/US 250 | Fitchville | Norwalk | ||||
| SR 60 | Ashland | Loudonville | ||||
| SR 58 | Ashland | South of Sullivan | ||||
| SR 58 | South of Sullivan | Oberlin | ||||
| SR 39 | Mansfield | Millersburg | ||||
| US 30, SR 430 | Mansfield | Wooster | ||||
| SR 179 | Hayesville | Nashville | ||||
| SR 96 | Ashland | Shelby | ||||
| SR 60 | Savannah | Vermilion | ||||
| SR 46 | Niles | Ashtabula | ||||
| SR 307, Mells Road, Stanhope-Kelloggsville Road | Jefferson | West Andover | ||||
| SR 85, US 6 | West Andover | Pennsylvania | ||||
| SR 307 | Jefferson | Geneva (south of) | ||||
| SR 86 | Painesville | Windsor | ||||
| SR 45 | Windsor | Warren | ||||
| SR 534 | Windsor | Geneva | ||||
| US 33 | Logan | Athens | ||||
| SR 144, US 50 | Athens | Hockingport | ||||
| SR 550 | Athens | Marietta | ||||
| SR 13 | New Lexington | Chauncey | ||||
| US 33 | Athens | Pomeroy | ||||
| US 50 | Athens | McArthur | ||||
| SR 7 | Pomeroy | Little Hocking | ||||
| SR 377 | McConnelsville | Sharpsburg | ||||
| SR 143 | Pomeroy | West of Albany | ||||
| US 25 (former) | Sidney | Wapakoneta | ||||
| US 33 | Wapakoneta | St. Marys | ||||
| SR 67 | Wapakoneta | Kenton | ||||
| SR 29, SR 703 | St. Marys | Celina | ||||
| US 33, SR 366 | North of Huntsville | Wapakoneta | ||||
| SR 29 | Sidney | St. Marys | ||||
| SR 66 | Piqua | St. Marys | ||||
| SR 119 | Indiana | Minster | ||||
| SR 119 | Minster | Northwest of Sidney | ||||
| US 33 | St. Marys | Indiana | ||||
| SR 197 | Celina | Kossuth | ||||
| US 68 | Georgetown | Wilmington | ||||
| US 68 | Georgetown | Ripley | ||||
| US 62 | Ripley | Hillsboro | ||||
| SR 221 | Georgetown | Higginsport | ||||
| SR 4, SR 73 | Hamilton | Franklin | ||||
| US 127 | Hamilton | Eaton | ||||
| SR 177 | Hamilton | Indiana | ||||
| US 27 | Indiana | McGonigle | ||||
| US 27 | McGonigle | Northeast of Ross | ||||
| SR 130 | Hamilton | McGonigle | ||||
| SR 122 | Eaton | Middletown | ||||
| SR 63 | Hamilton (east of) | Lebanon | ||||
| SR 4 | Middletown | Germantown | ||||
| US 68 | Springfield | Urbana | ||||
| SR 29 | Urbana | West Jefferson | ||||
| US 68 | Urbana | Bellefontaine | ||||
| US 36 | Piqua | Urbana | ||||
| US 36 | Urbana | Marysville | ||||
| SR 29 | Urbana | Sidney | ||||
| Troy Urbana Road | Troy | Urbana | ||||
| SR 56 | Urbana (east of) | London | ||||
| US 68 | Springfield | Xenia | ||||
| SR 41 | Springfield | Troy | ||||
| SR 41 | Springfield | Washington Court House | ||||
| SR 571 | West Milton | Donnelsville | ||||
| SR 19 | Bucyrus | Broken Sword | ||||
| SR 100 | Broken Sword | Tiffin | ||||
| US 30 | Bucyrus | Upper Sandusky | ||||
| SR 19 | Galion | Bucyrus | ||||
| SR 309 | Mansfield | Galion | ||||
| US 30 | Bucyrus | Crestline | ||||
| SR 61 | Shelby | Galion | ||||
| SR 98 | Plymouth | Bucyrus | ||||
| SR 61 | Galion | Mount Gilead | ||||
| SR 181 | Crestline | Ontario (west of) | ||||
| US 36 | Greenville | Covington | ||||
| SR 571 | Greenville | West Milton | ||||
| US 127 | Eaton | Greenville | ||||
| US 127 | Celina | Greenville | ||||
| SR 571 | Greenville | Union City | ||||
| SR 49 | Greenville | Fort Recovery | ||||
| SR 121 | Greenville | Versailles | ||||
| SR 121 | Greenville | Indiana | ||||
| SR 185 | Piqua | Versailles | ||||
| SR 47 | Sidney | Versailles | ||||
| SR 185 | Versailles | Brock | ||||
| US 224 | Findlay | Tiffin | ||||
| SR 25 | Findlay | Bowling Green | ||||
| US 68 | Findlay | Kenton | ||||
| SR 199, SR 568 | Findlay | Upper Sandusky | ||||
| SR 15 | Ottawa | Findlay | ||||
| SR 18 | Hoytville | Fostoria | ||||
| SR 18 | Deshler (west of) | Hoytville | ||||
| SR 186, SR 235 | Hoytville | Findlay (west of) | ||||
| US 68 | Bellefontaine | Kenton | ||||
| SR 53 | Kenton | Forest | ||||
| SR 31 | Marysville | Kenton | ||||
| SR 67 | Kenton | Upper Sandusky | ||||
| SR 235 | Roundhead | Ada | ||||
| SR 81 | Ada | Forest | ||||
| SR 235 | Roundhead | Lakeview | ||||
| SR 53 | Forest | Upper Sandusky | ||||
| SR 47 | Sidney | Bellefontaine | ||||
| US 33 | Marysville | Bellefontaine | ||||
| SR 47 | Bellefontaine | East of Richwood | ||||
| US 25 (former) | Piqua | Sidney | ||||
| US 36 | Delaware | Marysville | ||||
| SR 38 | Marysville | London | ||||
| SR 37 | South of Richwood | Delaware | ||||
| US 42 | Delaware | London | ||||
| SR 161 | Plain City | Dublin (west of) | ||||
| SR 56 | London | Circleville | ||||
| SR 38 | Bloomingburg (south of) | Bloomingburg | ||||
| SR 38 | Bloomingburg | London | ||||
| US 25 (former) | Piqua | Troy | ||||
| US 36 | Piqua | Covington | ||||
| SR 41 | Covington | Troy | ||||
| US 68 | Wilmington | Xenia | ||||
| US 35 | Eaton | Indiana | ||||
| SR 123 | Franklin | Lebanon | ||||
| SR 73 | Franklin | Wilmington | ||||
| SR 123 | Lebanon | Morrow | ||||
| SR 123 | Roachester | Blanchester | ||||
| SR 73 | Wilmington | Hillsboro | ||||
| SR 132 | Batavia | Owensville | ||||
| SR 132 | Batavia | New Richmond | ||||
| SR 133, SR 222 | Bethel | Chilo | ||||
| US 50 | Hillsboro | Chillicothe | ||||
| US 62 | Hillsboro | Washington Court House | ||||
| SR 138 | Hillsboro | Greenfield | ||||
| SR 124 | Hillsboro | Piketon | ||||
| US 127 | Celina | Van Wert | ||||
| SR 49 | Fort Recovery | Willshire | ||||
| SR 29 | Celina | Indiana | ||||
| SR 118 | Van Wert | Rockford | ||||
| SR 53 | Upper Sandusky | Tiffin | ||||
| SR 67, SR 18, SR 113 | Upper Sandusky | Northeast of Bellevue | ||||
| US 23 | Fostoria | Carey | ||||
| SR 53 | Fremont | Tiffin | ||||
| SR 18 | Tiffin | Fostoria | ||||
| SR 101 | Tiffin | South of Clyde | ||||
| SR 113 (former) | South of Clyde | Bellevue | ||||
| US 224 | Tiffin | Chicago Junction | ||||
| SR 199 | Perrysburg | Fostoria | ||||
| US 20 | Fremont | Bellevue | ||||
| US 20 | Fremont | Southeast of Woodville | ||||
| US 20 | Southeast of Woodville | Perrysburg | ||||
| SR 101 | Sandusky | Clyde (south of) | ||||
| SR 53 | Fremont | Port Clinton | ||||
| US 6 | Fremont | Bowling Green | ||||
| SR 105 | Bowling Green | Oak Harbor | ||||
| SR 163 | Oak Harbor | Port Clinton | ||||
| SR 19 | Fremont | Oak Harbor | ||||
| SR 412 | Fremont | Castalia | ||||
| SR 25 | Bowling Green | Perrysburg | ||||
| SR 64 | Bowling Green | Waterville | ||||
| SR 110 (former) | Grand Rapids | Bowling Green (north of) | ||||
| SR 65 | Ottawa | McClure | ||||
| SR 65 | McClure | North of McClure | ||||
| SR 110 | North of McClure | Grand Rapids | ||||
| SR 295 | Grand Rapids | Grand Rapids (north of) | ||||
| US 6 | Bowling Green | Napoleon | ||||
| SR 13 | Mansfield | Fitchville | ||||
| SR 113 | Milan | Berlinville | ||||
| SR 113 | Berlinville | Elyria | ||||
| US 20 | Bellevue | Norwalk | ||||
| US 20, SR 511 | Oberlin | Norwalk | ||||
| SR 18 | Medina | Norwalk | ||||
| SR 61 | Plymouth | Norwalk | ||||
| SR 162 | New London | Fitchville | ||||
| US 250 | Sandusky | Norwalk | ||||
| SR 147 | Barnesville | Bellaire | ||||
| SR 108 | Wauseon | Napoleon | ||||
| SR 2 | Bryan | Wauseon | ||||
| SR 108 | Wauseon | Michigan | ||||
| SR 109 | McClure (west of) | Michigan | ||||
| SR 64 | Swanton | Michigan | ||||
| SR 66, US 127 | Archbold | Michigan | ||||
| SR 66 | Archbold | Defiance | ||||
| SR 107, US 20A | Burlington | Montpelier (west of) | ||||
| SR 2 | Bryan | Hicksville | ||||
| SR 2 | Hicksville | Indiana | ||||
| SR 15 | Bryan | Ney | ||||
| SR 15 | Ney | Defiance | ||||
| SR 15 | Bryan | Michigan | ||||
| US 127 | Bryan | Alvordton (east of) | ||||
| SR 34 | Bryan | Indiana | ||||
| US 6 | Bryan | Indiana | ||||
| SR 34, US 6 | Bryan | Napoleon | ||||
| SR 49 | Edon | Michigan | ||||
| SR 191 | Stryker | Evansport (east of) | ||||
| US 20, SR 511 | Oberlin | Elyria | ||||
| SR 57 | Medina | Elyria | ||||
| SR 57 | Elyria | Lorain | ||||
| US 24 | Napoleon | Defiance | ||||
| SR 109, SR 108, CR 10A | Ottawa | Napoleon | ||||
| SR 18 | Defiance | East of Holgate | ||||
| SR 18 | East of Holgate | Deshler (west of) | ||||
| SR 115 (former), SR 108 | North of Holgate | Kieferville | ||||
| SR 57 | Medina | Wadsworth | ||||
| SR 5 | Ravenna | Warren | ||||
| SR 59 | Kent | Ravenna | ||||
| SR 44 | Painesville | Ravenna | ||||
| US 422 | Warren | Parkman | ||||
| SR 168 | Parkman | Burton | ||||
| SR 88 | Ravenna | Parkman | ||||
| US 6 | Chardon | Hambden | ||||
| SR 166, SR 528 | Hambden | Madison | ||||
| SR 46 | Canfield | Niles | ||||
| SR 82 | Warren | Sharon, PA | ||||
| SR 5 | Warren | Pennsylvania | ||||
| US 62 | Youngstown | Sharon, PA | ||||
| US 42 | Delaware | Mount Gilead | ||||
| SR 95, SR 13 | Mount Gilead | Mount Vernon | ||||
| US 42 | Mount Gilead | Mansfield | ||||
| SR 61 | Mount Gilead | Sunbury | ||||
| SR 37 | Delaware | Newark (west of) | ||||
| SR 13 | Newark | Mount Vernon | ||||
| SR 13 | Mount Vernon (north of) | Mansfield | ||||
| US 36, SR 715 | Mount Vernon | Coshocton | ||||
| SR 205 | Danville | Jelloway | ||||
| SR 39 | Millersburg | Canal Dover | ||||
| SR 83 | Millersburg | Wooster | ||||
| SR 60 | Coshocton (west of) | Killbuck | ||||
| SR 60 | Zanesville | Trinway | ||||
| SR 60, SR 376 | Zanesville | McConnelsville | ||||
| SR 146 | Newark (east of) | Zanesville (north of) | ||||
| SR 16 | Newark | Coshocton | ||||
| SR 146, SR 215 (former) | Zanesville | Caldwell (north of) | ||||
| SR 209 | Cambridge | Bloomfield | ||||
| SR 83 | Bloomfield | Coshocton | ||||
| SR 93 | Zanesville (south of) | New Lexington (east of) | ||||
| SR 93 | Zanesville | Otsego | ||||
| US 21 (former) | Cambridge | Newcomerstown | ||||
| SR 821 | Cambridge | Caldwell | ||||
| SR 37 | McConnelsville | New Lexington | ||||
| SR 93 | Logan | New Lexington | ||||
| SR 13 | Newark | New Lexington | ||||
| SR 37 | Lancaster | New Lexington | ||||
| SR 155 | Shawnee | Corning | ||||
| SR 79, SR 37 | Lancaster | Newark | ||||
| US 33 | Logan | Lancaster | ||||
| SR 159 | Chillicothe (north of) | Lancaster (south of) | ||||
| SR 56 | Circleville | Adelphi | ||||
| SR 180 | Chillicothe (north of) | Logan (west of) | ||||
| US 35 | Chillicothe | Jackson | ||||
| US 50 | Chillicothe | McArthur | ||||
| SR 124 | Jackson | Piketon | ||||
| SR 220 | Waverly | Zahn's Corner | ||||
| US 30 | Lisbon | Minerva (east of) | ||||
| unbuilt | Minerva (east of) | Minerva (north of) | ||||
| US 30 | Minerva (east of) | Minerva | ||||
| SR 183 | Minerva | Sandyville | ||||
| US 250 | Dennison | Cadiz | ||||
| SR 9 | Cadiz | Carrollton | ||||
| SR 151 | Dennison (east of) | Bowerston | ||||
| SR 151 | Bowerston | Jewett (west of) | ||||
| New Rumley Road | Jewett (west of) | Jewett (southwest of) | ||||
| Old Jewett Road | Jewett (west of) | Jewett | ||||
| SR 151 | Jewett | Hopedale | ||||
| SR 212 | Dellroy | Bowerston | ||||
| SR 9 | Carrollton | Kensington | ||||
| SR 39 | Carrollton | Canal Dover | ||||
| SR 39 | Carrollton | Salineville | ||||
| SR 152 | Skelley | Empire | ||||
| SR 151 | Mingo Junction | Hopedale | ||||
| SR 150 | Mount Pleasant (west of) | Rayland | ||||
| SR 39 | Salineville | Wellsville | ||||
| SR 164 | Lisbon | Salineville | ||||
| SR 517, SR 558 | Lisbon | East Palestine | ||||
| SR 165 | East Palestine | Pennsylvania | ||||
| SR 9 | Salem | Hanoverton | ||||
| SR 78 | Woodsfield | Clarington | ||||
| SR 78, SR 145, SR 724 | Caldwell | Woodsfield | ||||
| SR 800 | Woodsfield | Fly | ||||
| SR 145 | Lower Salem | Jerles | ||||
| SR 26 | Woodsfield | Marietta | ||||
| SR 78 | Caldwell | McConnelsville | ||||
| SR 821 | Caldwell | Marietta | ||||
| SR 147 | Caldwell (east of) | Barnesville (west of) | ||||
| SR 60 | Marietta | McConnelsville | ||||
| SR 124, US 33 | Pomeroy | West Virginia | ||||
| SR 124 | Pomeroy | Jackson | ||||
| SR 93 | McArthur | Jackson | ||||
| SR 93 | McArthur | Logan | ||||
| SR 160 | Gallipolis | McArthur (south of) | ||||
| US 35 | Jackson | Gallipolis | ||||
| SR 93 | Jackson | Ironton | ||||
| SR 233 | Oak Hill | Cadmus | ||||
| SR 140 | Oak Hill | Portsmouth (east of) | ||||
| SR 139 | Jackson | Portsmouth | ||||
| SR 141 | Ironton | Ironton (east of) | ||||
| SR 217 | Ironton (east of) | Miller | ||||
| SR 141 | Gallipolis | Ironton (east of) | ||||
| SR 73 | Portsmouth | Portsmouth (north of) | ||||
| SR 104 | Portsmouth (north of) | Lucasville (west of) | ||||
| SR 348 | Lucasville (west of) | Lucasville | ||||
| US 36 | Newcomerstown | Coshocton | ||||
| SR 751 | West Lafayette | Stone Creek | ||||
| US 21 (former) | Stone Creek | New Philadelphia (west of) | ||||
| SR 211 (former) | Canal Dover | New Philadelphia (west of) | ||||
| US 21 (former) | New Philadelphia (west of) | New Philadelphia | ||||
| SR 93, CR 106 | Marquand Mills | Newcomerstown (west of) | ||||
| SR 79 | Walhonding | Fallsburg (east of) | ||||
| SR 668 (former) | Fallsburg (east of) | Newark (east of) | ||||
| US 250 | New Philadelphia | Uhrichsville | ||||
| US 36 | Newcomerstown | Uhrichsville | ||||
| US 250 | Wooster | Strasburg (north of) | ||||
| SR 21 | Strasburg (north of) | Canal Dover | ||||
| US 21 (former) | Newcomerstown | Stone Creek | ||||
| McQuaid Road | Orrville | Wooster (east of) | ||||
| SR 57 | Orrville | Easton | ||||
| US 30 | Van Wert | Delphos | ||||
| US 30 | Van Wert | Indiana | ||||
| SR 18 | Hicksville | Defiance | ||||
| SR 15 | Ottawa | Defiance | ||||
| US 24 | Defiance | Indiana | ||||
| SR 111 | Defiance | Paulding | ||||
| US 127 | Paulding | Ney | ||||
| SR 66 | Defiance | Delphos | ||||
| SR 249 | Ney | Indiana | ||||
| SR 49 | Convoy (north of) | Hicksville | ||||
| SR 18 | Hicksville | Indiana | ||||
| SR 500 | Paulding | Payne | ||||
| US 127 | Van Wert | Paulding | ||||
| SR 613 | Continental (east of) | Paulding (south of) | ||||
| SR 613 | Payne | Indiana | ||||
| SR 111 | Paulding | Payne (north of) | ||||
| US 224 | Van Wert | Indiana | ||||
| US 224 | Van Wert | Ottawa | ||||
| SR 39 | Shelby | Mansfield | ||||
| SR 61 | Shelby | Plymouth | ||||
| SR 2 | Bono | Port Clinton | ||||
| SR 163 | Oak Harbor | Genoa | ||||
| SR 163 | Port Clinton | Marblehead | ||||
| SR 136 | West Union (west of) | Hillsboro (south of) | ||||
| SR 213 | Steubenville | Knoxville | ||||
| SR 213 | Knoxville | Yellow Creek | ||||
| SR 229 | Mount Vernon | Newcastle | ||||
| SR 167 (former) | Dorset | Pennsylvania | ||||
| SR 235 | Dayton | East of Brandt | ||||
| SR 175 | Bedford | Euclid (east of) | ||||
| SR 87 | Burton | North Bloomfield | ||||
| SR 195 | Roundhead (north of) | McGuffey (north of) | ||||
| SR 18 | Tiffin | Republic | ||||
| SR 16 | Roscoe | Coshocton (south of) | ||||
| SR 134 | Wilmington | Sardinia | ||||
| SR 222 | Nicholsville (north of) | Felicity | ||||
| SR 104 | Columbus | Chillicothe | ||||
| SR 89 | Mohicanville | South of Sullivan | ||||
| SR 99 | Monroeville | Chicago Junction | ||||
| SR 192 (former) | Bryan | Evansport (north of) | ||||
| SR 110 | Napoleon | North of McClure | ||||
| SR 133 | Felicity | Utopia (west of) | ||||
| SR 135 | Allensburg | Lynchburg | ||||
| SR 43 | Cleveland | Aurora | ||||
| SR 43 | Aurora | Suffield | ||||
| SR 256 | Baltimore | Reynoldsburg | ||||
| SR 158 | Lancaster | Kirkersville | ||||
| SR 188 | Lancaster | Circleville | ||||
| SR 242 (former) | Beamsville | Versailles | ||||
| SR 57 | Orrville | Dalton (west of) | ||||
| SR 91 | Solon | Willoughby | ||||
| SR 129 | Hamilton | Scipio | ||||
| SR 47 | Versailles | Dawn | ||||
| US 62 | Harrisburg | Beloit (south of) | ||||
| SR 204 | Millersport (west of) | Mount Perry (south of) | ||||
| SR 55 | Troy | Urbana | ||||
| SR 72 | Springfield | Jamestown | ||||
| SR 72 | Jamestown | Hillsboro (north of) | ||||
| SR 82 | Aurora | Warren (west of) | ||||
| US 6 | Hambden | Andover | ||||
| SR 84 | Ashtabula | Pennsylvania | ||||
| SR 541 | Coshocton | Kimbolton | ||||
| SR 603, Ganges 5 Points Road | Ganges (south of) | Plymouth | ||||
| SR 79 | Newark | Fallsburg (east of) | ||||
| SR 276 | Williamsburg | Owensville | ||||
| SR 38 (former) | Washington Court House | Bloomingburg | ||||
| SR 116 | St. Marys | Monticello (north of) | ||||
| SR 97 | Bellville | Lexington | ||||
| SR 83, SR 146 | McConnelsville (east of) | Cambridge (south of) | ||||
| SR 19 | Broken Sword | North of Republic | ||||
| SR 228 | North of Republic | Southwest of Clyde | ||||
| US 224 | Canfield | Pennsylvania | ||||
| SR 202 | Dayton | Troy | ||||
| SR 45 | Lisbon (south of) | Wellsville | ||||
| SR 43 | Carrollton (north of) | Malvern | ||||
| SR 182 (former) | Bucyrus | Upper Sandusky | ||||
| SR 108 | Holgate | Miller City (south of) | ||||
| Bradbury Road | Middleport | East of Rutland | ||||
| US 30 | Osnaburg | Minerva | ||||
| SR 131 | Milford | Vera Cruz | ||||
| SR 230 (former) | Fremont (southwest of) | Fremont (west of) | ||||
| SR 196 | New Hampshire | Westminster | ||||
| SR 54 | South Charleston | Urbana | ||||
| US 36 | Greenville (south of) | Indiana | ||||
| SR 176 | Richfield | Cleveland | ||||
| SR 170 | Unity | Petersburg | ||||
| US 30 | Mansfield | Crestline | ||||
| SR 7, SR 164 | East Liverpool | Youngstown | ||||
| SR 613 | Leipsic | McComb | ||||
| SR 104 | Lucasville (west of) | Waverly | ||||
| SR 78 | Glouster | McConnelsville | ||||
| SR 800 | West of Hendrysburg | Dennison | ||||
| SR 79 | Lakeside | Hebron (east of) | ||||
| SR 218, SR 553 | Crown City | Gallipolis (south of) | ||||
| SR 243 (former) | Proctorville | Athalia (south of) | ||||
| SR 189 | Fort Jennings | Vaughnsville | ||||
| US 62 (former) | Canton | Navarre | ||||
| US 30 | Gomer | Upper Sandusky | ||||
| SR 83 | New Concord | Bloomfield | ||||
| SR 183, SR 700, Rock Spring Road | Atwater Center | Welshfield | ||||
| SR 19 | North of Republic | Fremont | ||||
| SR 45 | Salem | Warren | ||||
| SR 114 | Indiana | Mandale | ||||
| SR 216, SR 78 | Nelsonville | New Straitsville | ||||
| SR 208 | Dresden | Adamsville | ||||
| SR 61 | Norwalk | Berlinville | ||||
| SR 61 | Berlinville | Ceylon | ||||
| SR 307 | Madison (south of) | Geneva (south of) | ||||
| SR 43 | Suffield | Canton | ||||
| SR 528 | Madison | North Madison | ||||
| SR 283 | Euclid | Painesville | ||||
| SR 231 | Nevada | Nevada (north of) |