County routes in Seneca County, New York, are not posted on route markers; however, several routes are known only as "County Road #" and are signed as such on street blade signs. The designation is only occasionally shown on street blade signs for routes that have other names. Numbers are generally assigned from the Wayne County line in the north to the Schuyler and Tompkins county lines in the south.
| Route | Length (mi) | Length (km) | From | Via | To | Notes |
|---|---|---|---|---|---|---|
| 6.82miles | Former Seneca Falls village line in Seneca Falls | Gravel Road | CR 105 in Tyre | Part south of NY 318 was formerly part of NY 390A | ||
| 0.23miles | CR 101 | County Road 101A in Tyre | Dead end at New York State Thruway | |||
| 2.31miles | Former Seneca Falls village line in Seneca Falls | Black Brook Road | NY 318 in Tyre | Formerly part of NY 390 | ||
| 1.07miles | CR 101 at Wayne County line (becomes CR 372) | Armitage Road in Tyre | Wayne County line (becomes CR 373) | |||
| 0.6miles | NY 89 | Mays Point Road in Tyre | NY 89 | |||
| 7.91miles | NY 96 in Waterloo | Burgess and Birdsey roads | CR 107 / CR 109 in Junius | |||
| 6.42miles | NY 96 / CR 114 in Waterloo | Whiskey Hill Road | Wayne County line in Junius (becomes CR 346) | |||
| 4.99miles | NY 96 / CR 113 in Waterloo | Nine Foot Road | CR 109 in Junius | Part south of NY 318 was formerly NY 391 | ||
| 2.99miles | Ontario County line | Dublin Road in Junius | CR 106 / CR 107 | |||
| 1.2miles | Ontario County line | Border City Road in Waterloo | US 20 / NY 5 | Former routing of US 20 / NY 5 | ||
| 2.44miles | Ontario County line | Packwood Road in Waterloo | US 20 / NY 5 | |||
| 2.44miles | CR 112 | Edwards Road in Waterloo | NY 96 / CR 108 | |||
| 1.93miles | US 20 / NY 5 | Brewer Road in Waterloo | NY 96 / CR 107 | |||
| 4.01miles | Former Seneca Falls village line | East Bayard and Lower Lake roads in Seneca Falls | NY 89 | |||
| 2.76miles | CR 119 at west Waterloo village line | River Street and River Road | California Avenue in Seneca Falls | Discontinuous at NY 96 | ||
| 0.11miles | CR 117 | Water Falls Bridge in Seneca Falls | US 20 / NY 5 / NY 414 | |||
| 2.73miles | NY 96 in Fayette | County House Road | NY 414 in Seneca Falls | |||
| 4.64miles | NY 96A | Boodys Hill and West River roads in Fayette | CR 117 at Waterloo village line | |||
| 1.93miles | NY 96A | Yellow Tavern Road in Fayette | CR 121 | |||
| 1.83miles | Ritter Road | Marshall Road in Fayette | NY 96 | |||
| 9.66miles | NY 336 | MacDougall and Yellow Tavern roads in Fayette | NY 89 | |||
| 1.45miles | NY 96 in Waterloo | North Road | NY 414 in Seneca Falls | |||
| 3.25miles | NY 414 / CR 154 in Fayette | Town Line and Hoster roads | NY 89 in Varick | |||
| 9.82miles | South 1 Mile in Romulus | Kennedy and East Lake roads | NY 96A in Fayette | Includes spur into Sampson State Park | ||
| 1.9miles | CR 125 in Fayette | Yale Station Road | NY 336 in Varick | |||
| 1.66miles | CR 125 | Yale Farm Road in Varick | NY 96A | |||
| 2.35miles | NY 414 | Ernsberger Road in Varick | NY 89 | Former routing of NY 89 | ||
| 10.76miles | NY 96A / CR 146 in Lodi | County Road 129 | NY 414 in Varick | |||
| 1.57miles | NY 96 / NY 414 | County Road 130 in Romulus | CR 129 | |||
| 3.79miles | CR 136 in Lodi | Upper Lake Road | CR 132 in Ovid | |||
| 3.99miles | East Lake Road at Seneca Lake in Romulus | Gilbert Road and South Street | NY 96A / NY 414 in Ovid | |||
| 0.5miles | NY 96A | Connection to CR 132 in Romulus | NY 96A | |||
| 0.4miles | Cherry Hill Road in Romulus | County Road 135 | NY 96 in Varick | |||
| 0.27miles | NY 96 | Prospect Street in Romulus | CR 148 | |||
| 2.73miles | Lower Lake Road in Lodi | Lodi Point Road and West Seneca Street | CR 136A in Lodi village | |||
| 0.99miles | NY 414 in Lodi | Mill Street | CR 136 in Lodi village | |||
| 0.31miles | Dead end | Lodi Station Road in Lodi | CR 136 | |||
| 6.41miles | NY 414 | County Road 137 in Lodi | NY 414 | |||
| 1.78miles | NY 96 in Ovid | County Road 138 | NY 89 in Romulus | |||
| 0.17miles | End of county maintenance | Ovid Depot Road in Romulus | NY 96 / NY 414 | |||
| 7.8miles | NY 96A | Seneca Street in Ovid | CR 153 | |||
| 0.18miles | CR 139 | County Road 139A in Ovid | NY 96 | |||
| 2.51miles | NY 96 in Interlaken | Cayuga Street | CR 153 in Ovid | |||
| 1.52miles | NY 96 | County Road 141A in Covert | CR 141 / CR 141B | |||
| 0.23miles | CR 141 / CR 141A | County Road 141B in Covert | NY 89 | |||
| 3.21miles | CR 143 | County Road 142 in Covert | NY 96 | |||
| 5.05miles | CR 146 in Lodi | County Road 143 | NY 96 in Covert | |||
| 1.29miles | Tompkins County line | Kings Corners Road in Covert | NY 89 | |||
| 0.4miles | NY 96 | Schier Road in Covert | End of county maintenance | |||
| 3.97miles | CR 143 | County Road 146 in Lodi | NY 96A / CR 129 | |||
| 0.42miles | NY 96A | Kendaia Road in Romulus | Dead end at Finger Lakes Railway | |||
| 0.8miles | NY 96 in Romulus | County Road 148 | NY 414 in Varick | Former routing of NY 414 | ||
| 0.14miles | Dead end | Caywood Road in Lodi | NY 414 | |||
| 1.14miles | NY 96 | County Road 150 in Covert | CR 141 | |||
| 2.11miles | CR 141 | County Road 153 in Ovid | CR 139 | |||
| 3.19miles | NY 414 / CR 124 | Five Points Road in Fayette | CR 121 |