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The following is a list of county routes in Union 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 Union County:

• CR 509, CR 509 Spur, CR 512, CR 514, CR 527, CR 531, CR 577

Other county routes

Route	Length (mi)	Length (km)	From	Via	To	Notes
CR 601	4.51	7.26	CR 601 at the Middlesex County line in Plainfield	West 7th Street, East 7th Street, La Grande Avenue, Laurel Place	Route 28 in Fanwood
CR 602	0.79	1.27	CR 602 at the Middlesex County line in Colonia	Inman Avenue, West Inman Avenue	County Route 609 in Rahway
CR 603	0.93	1.50	CR 603 at the Middlesex County line in Plainfield	Plainfield Avenue	Route 28 in Plainfield
CR 604	1.72	2.77	CR 607 in Clark	Madison Hill Road	CR 613 in Rahway
CR 605	0.2	0.32	CR 509 in Westfield	Nomahegan Drive	Dead end in Westfield
CR 606	2.4	3.86	CR 610 in Westfield	Lamberts Mill Road, Rahway Avenue, Westfield Avenue	CR 613 in Clark
CR 607	4.9	7.89	Middlesex County line in Clark	Oak Ridge Road, Raritan Road	CR 612 in Roselle
CR 608	1.4	2.25	CR 613 in Clark	Valley Road	CR 615 in Linden
CR 609	0.86	1.38	Route 35 in Rahway	New Brunswick Avenue	CR 621 in Rahway
CR 610	9.86	15.87	CR 611 in Fanwood	East 3rd Street, Midway Avenue, North Avenue, South Avenue, West 1st Avenue, East 1st Avenue, West Grand Street, East Grand Street	Route 27 in Elizabeth
CR 611	4	6.44	CR 606 in Scotch Plains	Raritan Road, Terrill Road	US 22 at the Somerset County line in Scotch Plains
CR 612	3.06	4.92	CR 617 in Roselle	West 3rd Avenue, Jersey Avenue, West Jersey Street	Route 27 in Elizabeth
CR 613	9.53	15.34	US 22 in Mountainside	Mountain Avenue, Broad Street, Central Avenue, Brant Avenue, Westfield Avenue, West Grand Avenue, East Grand Avenue	US 1/9 in Rahway
CR 614	0.92	1.48	Route 27 in Elizabeth	Pearl Street	US 1-9 in Elizabeth
CR 615	5.55	8.93	US 1-9 in Linden	South Stiles Street, North Stiles Street, Centennial Avenue, North Avenue East, Springfield Avenue	CR 509 in Cranford
CR 616	2	3.22	Rosewood Avenue in Roselle	Linden Road, Westfield Avenue, Galloping Hill Road	CR 509 in Union	Route 28 in Roselle Park
CR 617	5.7	9.17	US 1-9 in Linden	South Wood Avenue, North Wood Avenue, Amsterdam Avenue, 1st Avenue, Gordon Street, Westfield Avenue, Faitoute Avenue, Michigan Avenue	US 22 in Kenilworth
CR 618	2.70	4.35	CR 627 in Roselle Park	Magie Avenue, Orchard Street	CR 629 in Elizabeth
CR 619	6.38	10.27	CR 514 in Linden	Roselle Street, Chestnut Street, East 9th Avenue, Locust Street, Tucker Avenue, Chestnut Street, Stuyvesant Avenue	CR 619 at Essex County line in Union
CR 620	3.14	5.05	Route 28 in Plainfield	West Front Street, East Front Street, Front Street	CR 655 in Scotch Plains
CR 621	1.75	2.82	Route 27 in Rahway	West Hazelwood Avenue, East Hazelwood Avenue, Hart Street	Middlesex County line in Rahway
CR 622	6.60	10.62	CR 622 at the Somerset County line in Berkeley Heights	Mountain Avenue, Ashland Road, Mountain Avenue	CR 651 in Summit
CR 623	3.86	6.21	Route 439 in Elizabeth	Broad Street, North Broad Street	Essex County line in Hillside
CR 624	0.6	0.97	CR 641 in Berkeley Heights	Horseshoe Road	CR 622 in Berkeley Heights
CR 625	0.69	1.11	CR 619 in Roselle	Chestnut Street	CR 610 in Roselle
CR 626	0.91	1.46	US 22 in Union	West Chestnut Street	CR 619 in Union
CR 627	1.08	1.74	Route 28 in Roselle Park	Chestnut Street	CR 509 in Union
CR 628	0.73	1.17	CR 509 in Hillside	Hillside Avenue	CR 623 in Hillside
CR 629	0.74	1.19	Route 27 in Elizabeth	Morris Avenue	Route 439 in Union
CR 630	5.1	8.21	CR 630 Alt. at the Essex County line in Union	Vauxhall Road, Salem Road, Conant Street	Salem Avenue in Hillside
CR 631	0.88	1.42	CR 509 in Hillside	Bloy Street, Hillside Avenue	CR 509 in Hillside	Decommissioned
CR 632	2	3.22	CR 608 in Clark	Walnut Avenue	CR 610 in Cranford
CR 633	1.6	2.57	Route 82 in Union	Burnet Avenue	Essex County line in Union
CR 634	2.07	3.33	US 22 in Scotch Plains	Willow Avenue, Mountain Avenue	US 22 in Westfield
CR 635	2.26	3.64	US 22 in Mountainside	Mountain Avenue	Route 124 in Springfield
CR 636	1.6	2.57	CR 527 in Summit	Orchard Street, Shunpike Road	CR 639 in Springfield
CR 637	0.84	1.35	Magnolia Avenue in Elizabeth	Jefferson Avenue	North Avenue in Elizabeth
CR 638	0.2	0.32	Acme Street in Elizabeth	Linden Avenue	Route 439 in Elizabeth
CR 639	0.7	1.13	CR 509 Spur in Springfield	South Springfield Avenue	CR 635 in Springfield
CR 640	0.75	1.21	CR 655 in Berkeley Heights	McMane Avenue	CR 527 in Berkeley Heights
CR 641	2.6	4.18	CR 527 / CR 695 in Watchung	Plainfield Avenue	CR 512 in Berkeley Heights	Route runs through a portion of Somerset County, but is entirely maintained by Union County. Former southern segment (Bonnie Burn Road) transferred to Somerset County as CR 695 in October 2023.
CR 642	4.09	6.58	CR 527 in Scotch Plains	Sky Top Drive, Coles Avenue, Summit Lane	CR 643 in Mountainside
CR 643	2.37	3.81	US 22 in Mountainside	Summit Avenue, Baltusrol Road	CR 527 in Summit
CR 644	0.90	1.45	CR 642 in Mountainside	Tanager Way, Deer Path	CR 645 in Mountainside
CR 645	3.46	5.57	CR 613 in Mountainside	New Providence Road, Deer Path, W R Tracy Drive	CR 527 in Summit
CR 646	0.1	0.16	CR 658 in Elizabeth	Elizabethtown Plaza	Caldwell Place in Elizabeth	Serves county complex
CR 647	1.9	3.06	CR 622 in New Providence	South Street, Passaic Street	CR 647 at the Morris County line in New Providence
CR 648	1.29	2.08	Route 27 in Rahway	West Milton Avenue, East Milton Avenue	US 1-9 in Rahway
CR 649	2.21	3.56	CR 512 in Summit	Constantine Place, Passaic Avenue, River Road	Route 24/CR 649 at the Essex County line in Summit
CR 650	1.38	2.22	Route 27 in Rahway	West Scott Avenue, East Scott Avenue	US 1-9 in Rahway
CR 651	2.3	3.70	CR 527 in Summit	Morris Avenue, River Road, Chatham Road	Summit Avenue at the Morris County line in Summit
CR 652	0.4	0.64	CR 608 in Clark	Ross Street	Route 27 in Rahway
CR 653	0.77	1.24	CR 606 in Westfield	West Broad Street	Route 28 in Westfield
CR 654	0.67	1.08	US 22 in Springfield	Hillside Avenue	CR 635 in Springfield
CR 655	6.84	11.01	CR 607 in Clark	Lake Avenue, Martine Avenue, Park Avenue, New Providence Road, Diamond Hill Road	CR 622 in New Providence	Gap in route through a portion of Somerset County as CR 655
CR 656	0.71	1.14	Fairway Drive South in Union	Fairway Drive East	CR 619 in Union
CR 657	1.5	2.41	CR 651 in Summit	Summit Avenue	Route 24/Route 124 in Summit
CR 658	0.2	0.32	Route 27 in Elizabeth	Rahway Avenue	CR 623 in Elizabeth	Serves county complex
CR 660	0.39	0.63	CR 644 in Mountainside	Ackerman Avenue	CR 642 in Mountainside

See also

• U.S. Roads portal
• New Jersey portal

References

1. "500 Series Routes straight line diagram" (PDF). New Jersey Department of Transportation. Retrieved May 23, 2012.
2. "Union County straight line diagram" (PDF). New Jersey Department of Transportation. Retrieved June 6, 2012.
3. "List of Union County Roads" (PDF). Union County, NJ Dept. of Public Works. Archived from the original (PDF) on March 15, 2014. Retrieved January 13, 2013.
4. https://www.co.somerset.nj.us/home/showpublisheddocument/52551/638337736742570000

• Roads in Union County, New Jersey
• Lists of roads in New Jersey