List of county routes in Somerset County, New Jersey

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.

500-series county routes

In addition to those listed below, the following 500-series county routes serve Somerset County:^[1]

CR 512, CR 514, CR 518, CR 523, CR 525, CR 527, CR 529, CR 531, CR 533, CR 533 Spur, CR 567

Other county routes

Route^[2]^[3]	Length (mi)^[3]	Length (km)	From	Via	To	Notes
CR 601	7.21	11.60	Great Road West/Cherry Valley Road at the Mercer County line in Montgomery	Great Road, Belle Mead–Blawenburg Road	US 206 in Montgomery
CR 602	0.52	0.84	Camp Meeting Road / CSX's Trenton Subdivision in Montgomery	Skillman Road	CR 601 / Skillman Road in Montgomery
CR 603	1.85	2.98	Route 27 / Heathcote Road on the Franklin Township-South Brunswick line	Laurel Avenue, Kingston–Rocky Hill Road	CR 518 / Canal Road in Franklin Township
CR 604	1.50	2.41	CR 601 in Montgomery	Dutchtown–Harlingen Road	US 206 / Harlingen Road in Montgomery
CR 605	1.57	2.53	CR 605 at the Mercer County line in Montgomery	River Road, Crescent Avenue	CR 518 in Rocky Hill
CR 606	0.26	0.42	CR 567 in Branchburg	Studdiford Drive	CR 625 in Hillsborough
CR 607	1.14	1.83	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]
CR 608	1.67	2.69	US 206 in Hillsborough	Dukes Parkway East	CR 533 in Manville
CR 609	1.91	3.07	CR 533 in Montgomery	Bridgepoint Road	US 206 in Montgomery	Decommissioned in 2006,^[5] but still signed^[6]
CR 610	1.05	1.69	CR 623 in South Bound Brook	Edgewood Terrace	CR 527 in South Bound Brook
CR 612	1.34	2.16	Route 28 / South Gaston Avenue in Somerville	East Main Street	CR 533 / CR 633 in Bridgewater
CR 613	5.62	9.04	CR 512 in Bernards Township	Stonehouse Road, South Finley Avenue, North Finley Avenue, Childs Road	US 202 in Bernards Township
CR 614	2.13	3.43	US 22 in Branchburg	Easton Turnpike	US 22 / Route 28 / Garretson Road in Bridgewater
CR 615	5.23	8.42	Route 27 / Sand Hills Road on the Franklin Township-South Brunswick line	South Middlebush Road	CR 514 in Franklin Township
CR 616	2.79	4.49	CR 525 in Bridgewater	Washington Valley Road	CR 527 in Warren
CR 617	1.91	3.07	Route 27 / Oliver Avenue on the Franklin Township-New Brunswick line	Franklin Boulevard	CR 609 at the Middlesex County line in Franklin Township
CR 618	3.58	5.76	CR 525 in Warren	Mount Horeb Road	CR 651 in Warren	Designated by the New Jersey Department of Transportation as CR 607^[7]
CR 619	3.05	4.91	CR 514 in Franklin Township	Cedar Grove Lane	CR 527 in Franklin Township
CR 620	9.24	14.87	CR 665 in Bedminster	Burnt Mills Road, Washington Valley Road	CR 525 in Bridgewater
CR 621	4.30	6.92	CR 514 in Franklin Township	Elizabeth Avenue	CR 623 in South Bound Brook
CR 622	1.46	2.35	CR 653 / Mountain Avenue in Warren	Mountain Avenue	CR 622 at the Union County line in Warren
CR 623	4.15	6.68	CR 533 / Central Street in Manville	Wilhousky Street, Manville Causeway, Weston Canal Road, Canal Road	CR 527 in South Bound Brook
CR 624	1.03	1.66	CR 525 in Bernards Township	West Oak Street	CR 657 in Bernards Township
CR 625	8.27	13.31	CR 514 / Marshall Road in Hillsborough	Marshall Road, South Branch Road, River Road, Lyman Street	CR 567 / CR 626 in Raritan
CR 626	1.04	1.67	CR 567 / CR 625 in Raritan	Somerset Street	Route 28 in Somerville
CR 627	3.34	5.38	CR 625 in Hillsborough	New Centre Road	Roycefield Road / Dukes Parkway West in Hillsborough
CR 628	0.09	0.14	CR 671 in Peapack-Gladstone	Jackson Avenue	CR 647 / Jackson Avenue in Peapack-Gladstone
CR 629	1.70	2.74	CR 567 in Branchburg	Pleasant Run Road	CR 629 at the Hunterdon County line in Branchburg
CR 630	2.71	4.36	CR 533 in Montgomery	Belle Mead-Griggstown Road, Griggstown Road	US 206 in Montgomery
CR 631	0.34	0.55	US 22 in North Plainfield	Somerset Street, Johnston Drive	CR 531 in North Plainfield
CR 632	3.28	5.28	CR 533 in Montgomery	Griggstown Causeway, Canal Road, Bunker Hill Road	Route 27 / Road Road on the Franklin Township-South Brunswick line
CR 633	0.93	1.50	CR 533 / CR 612 in Bridgewater	Finderne Avenue	US 22 in Bridgewater
CR 634	3.24	5.21	Sebrings Mill Road in Green Brook	Greenbrook Road, Warrenville Road	CR 645 on the Green Brook-North Plainfield line
CR 635	0.48	0.77	CR 533 / Vosseller Avenue in Bound Brook	Vosseller Avenue	Route 28 / Vosseller Avenue in Bound Brook
CR 636	1.97	3.17	CR 645 on the Green Brook-North Plainfield line	Greenbrook Road	CR 531 in North Plainfield
CR 637	4.80	7.72	CR 567 in Branchburg	Old York Road, Dreahook Road, Readington Road, Raritan Valley College Road	CR 614 in Branchburg
CR 638	0.36	0.58	CR 527 / North Road in Warren	Washington Valley Road Extension	CR 651 in Warren
CR 639	2.61	4.20	Pannone Drive / Grove Street in Bridgewater	North Bridge Street, Foothill Road	US 202/US 206 in Bridgewater
CR 640	2.26	3.64	CR 512 in Bernards Township	Lyons Road, South Finley Avenue	CR 613 in Bernards Township
CR 641	2.39	3.85	CR 614 in Branchburg	Burnt Mills Road	CR 620 / Cowperthwaite Road in Bedminster
CR 642	1.51	2.43	CR 531 in North Plainfield	Mountain Avenue	US 22 in North Plainfield
CR 643	0.80	1.29	CR 626 / Veterans Memorial Drive in Somerville	Mountain Avenue	US 22 in Bridgewater
CR 644	0.39	0.63	Dead end in Raritan	Frelinghuysen Avenue	Route 28 in Raritan
CR 645	0.64	1.03	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
CR 646	0.56	0.90	US 202 in Branchburg	Chubb Way	CR 567 in Branchburg
CR 647	1.06	1.71	CR 512 in Peapack-Gladstone	Mendham Road	Mendham Road at Morris County line in Peapack-Gladstone
CR 648	1.34	2.16	CR 615 / Suydam Road in Franklin Township	Claremont Road	Route 27 on the Franklin Township-South Brunswick line
CR 649	0.95	1.53	Grant Avenue at Union County line in North Plainfield	West End Avenue	US 22 / West End Avenue in North Plainfield
CR 650	0.82	1.32	Dead end in Hillsborough	Schilke Lane, Amwell Road	CR 533 in Millstone
CR 651	6.13	9.87	Warrenville Road at Middlesex County line in Green Brook	Warrenville Road, Mount Bethel Road, King George Road	CR 512 in Bernards Township
CR 652	4.66	7.50	I-287 / Schley Mountain Road in Bedminster	Schley Mountain Road, Allen Road	CR 525 in Bernards Township	Unsigned
CR 653	3.02	4.86	CR 527 / CR 531 (Watchung Circle) in Watchung	Stirling Road	CR 606 at the Morris County line in Warren
CR 654	0.23	0.37	CR 533 in Bound Brook	East High Street	CR 689 / East High Street in Bound Brook
CR 655	0.82	1.32	CR 663 in Watchung	New Providence Road	CR 655 at the Union County line in Watchung
CR 656	0.07	0.11	Route 27 in Franklin Township	Andover Drive	CR 607 / Andover Drive on the Franklin Township-South Brunswick line	Unsigned
CR 657	2.07	3.33	CR 657 at the Morris County line in Bernards Township	South Maple Avenue	CR 624 in Bernards Township
CR 658	0.26	0.42	CR 533 in Hillsborough	Blackwells Mills Road	Canal Road / Blackwells Mills Road in Franklin Township
CR 659	2.48	3.99	CR 525 / Olcott Lane in Bernardsville	Claremont Road, Turnbull Lane, Bliss Road	Bliss Road at Morris County line in Bernardsville
CR 660	0.07	0.11	CR 514 in Hillsborough	Byara Court	Dead end in Hillsborough	Unsigned
CR 661	0.45	0.72	US 206 in Peapack-Gladstone	Holland Avenue	CR 512 in Peapack-Gladstone
CR 662	0.27	0.43	Dead end in Hillsborough	Brower Lane	Dead end in Hillsborough	Unsigned
CR 663	0.06	0.10	Ramp to US 22 at the Union County line in Watchung	Union Avenue	CR 655 in Watchung
CR 665	4.15	6.68	CR 614 in Branchburg	Lamington Road, Rattlesnake Bridge Road	CR 523 in Bedminster	Former CR 523 Spur
CR 667	0.99	1.59	CR 567 in Hillsborough	Elm Street, Maple Avenue, Pleasant Run Road	CR 567 in Branchburg
CR 671	0.83	1.34	CR 512 / Overlook Avenue in Peapack-Gladstone	Main Street, Old Chester Road	Old Chester Road at the Morris County line in Peapack-Gladstone
CR 673	0.95	1.53	CR 639 / Prince Rodgers Avenue in Bridgewater	Vogt Drive	Somerville Road / Bernardsville Drive in Bridgewater Township
CR 675	1.94	3.12	Dead end in Bridgewater	Polhemus Road, Chimney Rock Road	CR 525 in Bridgewater
CR 677	0.70	1.13	CR 514 / East Mountain Road in Hillsborough	East Mountain Road	CR 625 in Hillsborough
CR 679	1.56	2.51	CR 637 in Branchburg	Station Road	CR 614 in Branchburg
CR 681	0.10	0.16	CR 650 / Amsterdam Drive in Hillsborough	Amsterdam Drive	CR 514 in Hillsborough
CR 683	0.52	0.84	CR 533 in Bridgewater	Foothill Road	CR 675 in Bridgewater
CR 685	0.66	1.06	CR 533 in Bridgewater	Promenade Boulevard	I-287 / Route 28 in Bridgewater
CR 687	0.53	0.85	CR 533 in Bound Brook	Tea Street	Route 28 / Tea Street in Bound Brook
CR 689	0.34	0.55	CR 527 / CR 533 in Bound Brook	Bolmer Boulevard, East Street	Route 28 in Bound Brook
CR 691	0.08	0.13	CR 615 in Franklin Township	South Middlebush Road Extension	Dead end in Franklin Township	Unsigned
CR 693	0.06	0.10	CR 514 in Hillsborough	Service Road	CR 662 in Hillsborough	Unsigned
CR 695	0.9	1.45	Bonnie Burn Road / US 22 at 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]