The following is a list of county routes in Somerset County in the U.S. state of New Jersey. For more information on the county route system in New Jersey as a whole, including its history, see County routes in New Jersey.
In addition to those listed below, the following 500-series county routes serve Somerset County:[1]
| Route[2] | Length (mi)[3] | Length (km) | From | Via | To | Notes |
|---|---|---|---|---|---|---|
| 7.21miles | Great Road West/Cherry Valley Road at the Mercer County line in Montgomery | Great Road, Belle Mead - Blawenburg Road | US 206 in Montgomery | |||
| 0.52miles | Camp Meeting Road / CSX's Trenton Subdivision in Montgomery | Skillman Road | CR 601 / Skillman Road in Montgomery | |||
| 1.85miles | Route 27 / Heathcote Road on the Franklin Township-South Brunswick line | Laurel Avenue, Kingston - Rocky Hill Road | CR 518 / Canal Road in Franklin Township | |||
| 1.5miles | CR 601 in Montgomery | Dutchtown - Harlingen Road | US 206 / Harlingen Road in Montgomery | |||
| 1.57miles | CR 605 at the Mercer County line in Montgomery | River Road, Crescent Avenue | CR 518 in Rocky Hill | |||
| 0.26miles | CR 567 in Branchburg | Studdiford Drive | CR 625 in Hillsborough | |||
| 1.14miles | Route 27 on the Franklin Township-South Brunswick line | Old Road | Dead end on the Franklin Township-South Brunswick line | Unsigned, follows the Franklin Township, Somerset County-South Brunswick, Middlesex County line; also known as Middlesex CR 618[4] | ||
| 1.67miles | US 206 in Hillsborough | Dukes Parkway East | CR 533 in Manville | |||
| 1.91miles | CR 533 in Montgomery | Bridgepoint Road | US 206 in Montgomery | Decommissioned in 2006,[5] but still signed[6] | ||
| 1.05miles | CR 623 in South Bound Brook | Edgewood Terrace | CR 527 in South Bound Brook | |||
| 1.34miles | Route 28 / South Gibson Avenue in Somerville | East Main Street | CR 533 / CR 633 in Bridgewater | |||
| 5.62miles | CR 512 in Bernards Township | Stonehouse Road, South Finley Avenue, North Finley Avenue, Childs Road | US 202 in Bernards Township | |||
| 2.13miles | US 22 in Branchburg | Easton Turnpike | US 22 / Route 28 / Garretson Road in Bridgewater | |||
| 5.23miles | Route 27 / Sand Hills Road on the Franklin Township-South Brunswick line | South Middlebush Road | CR 514 in Franklin Township | |||
| 2.79miles | CR 525 in Bridgewater | Washington Valley Road | CR 527 in Warren | |||
| 1.91miles | Route 27 / Oliver Avenue on the Franklin Township-New Brunswick line | Franklin Boulevard | CR 609 at Middlesex County line in Franklin Township | |||
| 3.58miles | CR 525 in Warren | Mount Horeb Road | CR 651 in Warren | Designated by the New Jersey Department of Transportation as CR 607[7] | ||
| 3.05miles | CR 514 in Franklin Township | Cedar Grove Lane | CR 527 in Franklin Township | |||
| 9.24miles | CR 665 in Bedminster | Burnt Mills Road, Washington Valley Road | CR 525 in Bridgewater | |||
| 4.3miles | CR 514 in Franklin Township | Elizabeth Avenue | CR 623 in South Bound Brook | |||
| 1.46miles | CR 653 / Mountain Avenue in Warren | Mountain Avenue | CR 622 at the Union County line in Warren | |||
| 4.15miles | CR 533 / Central Street in Manville | Wilhousky Street, Manville Causeway, Weston Canal Road, Canal Road | CR 527 in South Bound Brook | |||
| 1.03miles | CR 525 in Bernards Township | West Oak Street | CR 657 in Bernards Township | |||
| 8.27miles | CR 514 / Marshall Road in Hillsborough Township | Marshall Road, South Branch Road, River Road, Lyman Street | CR 567 / CR 626 in Raritan | |||
| 1.04miles | CR 567 / CR 625 in Raritan | Somerset Street | Route 28 in Somerville | |||
| 3.34miles | CR 625 in Hillsborough | New Centre Road | Roycefield Road / Dukes Parkway West in Hillsborough | |||
| 0.09miles | CR 671 in Peapack-Gladstone | Jackson Avenue | CR 647 / Jackson Avenue in Peapack-Gladstone | |||
| 1.7miles | CR 567 in Branchburg | Pleasant Run Road | CR 629 at the Hunterdon County line in Branchburg | |||
| 2.71miles | CR 533 in Montgomery | Belle Mead-Griggstown Road, Griggstown Road | US 206 in Montgomery | |||
| 0.34miles | US 22 in North Plainfield | Somerset Street, Johnston Drive | CR 531 in North Plainfield | |||
| 3.28miles | CR 533 in Montgomery | Griggstown Causeway, Canal Road, Bunker Hill Road | Route 27 / Road Road on the Franklin Township-South Brunswick line | |||
| 0.93miles | CR 533 / CR 612 in Bridgewater | Finderne Avenue | US 22 in Bridgewater | |||
| 3.24miles | Sebrings Mill Road in Green Brook | Greenbrook Road, Warrenville Road | CR 645 on the Green Brook-North Plainfield line | |||
| 0.48miles | CR 533 / Vosseller Avenue in Bound Brook | Vosseller Avenue | Route 28 / Vosseller Avenue in Bound Brook | |||
| 1.97miles | CR 645 on the Green Brook-North Plainfield line | Greenbrook Road | CR 531 in North Plainfield | |||
| 4.8miles | CR 567 in Branchburg | Old York Road, Dreahook Road, Readington Road, Raritan Valley College Road | CR 614 in Branchburg | |||
| 0.36miles | CR 527 / North Road in Warren | Washington Valley Road Extension | CR 651 in Warren | |||
| 2.61miles | Pannone Drive / Grove Street in Bridgewater | North Bridge Street, Foothill Road | US 202/US 206 in Bridgewater | |||
| 2.26miles | CR 512 in Bernards Township | Lyons Road, South Finley Avenue | CR 613 in Bernards Township | |||
| 2.39miles | CR 614 in Branchburg | Burnt Mills Road | CR 620 / Cowperthwaite Road in Bedminster | |||
| 1.51miles | CR 531 in North Plainfield | Mountain Avenue | US 22 in North Plainfield | |||
| 0.8miles | CR 626 / Veterans Memorial Drive in Somerville | Mountain Avenue | US 22 in Bridgewater | |||
| 0.39miles | Dead end in Raritan | Frelinghuysen Avenue | Route 28 in Raritan | |||
| 0.64miles | Rock Avenue at Union County line in Green Brook/North Plainfield | Rock Avenue | US 22 / Rock Avenue on the Green Brook Township/North Plainfield line | |||
| 0.56miles | US 202 in Branchburg | Chubb Way | CR 567 in Branchburg | |||
| 1.06miles | CR 512 in Peapack-Gladstone | Mendham Road | Mendham Road at Morris County line in Peapack-Gladstone | |||
| 1.34miles | CR 615 / Suydam Road in Franklin Township | Claremont Road | Route 27 on the Franklin Township-South Brunswick line | |||
| 0.95miles | Grant Avenue at Union County line in North Plainfield | West End Avenue | US 22 / West End Avenue in North Plainfield | |||
| 0.82miles | Dead end in Hillsborough | Schilke Lane, Amwell Road | CR 533 in Millstone | |||
| 6.13miles | Warrenville Road at Middlesex County line in Green Brook | Warrenville Road, Mount Bethel Road, King George Road | CR 512 in Bernards Township | |||
| 4.66miles | I-287 / Schley Mountain Road in Bedminster | Schley Mountain Road, Allen Road | CR 525 in Bernards Township | Unsigned | ||
| 3.02miles | CR 527 / CR 531 (Watchung Circle) in Watchung | Stirling Road | CR 606 at the Morris County line in Warren | |||
| 0.23miles | CR 533 in Bound Brook | East High Street | CR 689 / East High Street in Bound Brook | |||
| 0.82miles | CR 663 in Watchung | New Providence Road | CR 655 at the Union County line in Watchung | |||
| 0.07miles | Route 27 in Franklin Township | Andover Drive | CR 607 / Andover Drive on the Franklin Township-South Brunswick line | Unsigned | ||
| 2.07miles | CR 657 at the Morris County line in Bernards Township | South Maple Avenue | CR 624 in Bernards Township | |||
| 0.26miles | CR 533 in Hillsborough | Blackwells Mills Road | Canal Road / Blackwells Mills Road in Franklin Township | |||
| 2.48miles | CR 525 / Olcott Lane in Bernardsville | Claremont Road, Turnbull Lane, Bliss Road | Bliss Road at Morris County line in Bernardsville | |||
| 0.07miles | CR 514 in Hillsborough | Byara Court | Dead end in Hillsborough | Unsigned | ||
| 0.45miles | US 206 in Peapack-Gladstone | Holland Avenue | CR 512 in Peapack-Gladstone | |||
| 0.27miles | Dead end in Hillsborough | Brower Lane | Dead end in Hillsborough | Unsigned | ||
| 0.06miles | Ramp to US 22 at the Union County line in Watchung | Union Avenue | CR 655 in Watchung | |||
| 4.15miles | CR 614 in Branchburg | Lamington Road, Rattlesnake Bridge Road | CR 523 in Bedminster | Former CR 523 Spur | ||
| 0.99miles | CR 567 in Hillsborough | Elm Street, Maple Avenue, Pleasant Run Road | CR 567 in Branchburg | |||
| 0.83miles | CR 512 / Overlook Avenue in Peapack-Gladstone | Main Street, Old Chester Road | Old Chester Road at the Morris County line in Peapack-Gladstone | |||
| 0.95miles | CR 639 / Prince Rodgers Avenue in Bridgewater | Vogt Drive | Somerville Road / Bernardsville Drive in Bridgewater Township | |||
| 1.94miles | Dead end in Bridgewater | Polhemus Road, Chimney Rock Road | CR 525 in Bridgewater | |||
| 0.7miles | CR 514 / East Mountain Road in Hillsborough | East Mountain Road | CR 625 in Hillsborough | |||
| 1.56miles | CR 637 in Branchburg | Station Road | CR 614 in Branchburg | |||
| 0.1miles | CR 650 / Amsterdam Drive in Hillsborough | Amsterdam Drive | CR 514 in Hillsborough | |||
| 0.52miles | CR 533 in Bridgewater | Foothill Road | CR 675 in Bridgewater | |||
| 0.66miles | CR 533 in Bridgewater | Promenade Boulevard | I-287 / Route 28 in Bridgewater | |||
| 0.53miles | CR 533 in Bound Brook | Tea Street | Route 28 / Tea Street in Bound Brook | |||
| 0.34miles | CR 527 / CR 533 in Bound Brook | Bolmer Street, East Street | Route 28 in Bound Brook | |||
| 0.08miles | CR 615 in Franklin Township | South Middlebush Road Extension | Dead end in Franklin Township | Unsigned | ||
| 0.06miles | CR 514 in Hillsborough | Service Road | CR 662 in Hillsborough | Unsigned | ||
| 0.9miles | Bonnie Burn Road / US 22 on the Union County line in Watchung | Bonnie Burn Road | CR 527 / CR 641 in Watchung | assigned in October 2023 to replace the former southern segment of Union CR 641[8] |