The following is a list of 500-series county routes 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.
| Route | Length | South/West end | North/East end | |
|---|---|---|---|---|
| County Route 501 | 53.07 miles (85.41 km) | Stelton Road in South Plainfield | Outerbridge Crossing in Perth Amboy | |
| Bayonne Bridge in Bayonne | New York state line in Rockleigh | |||
| County Route 502 | 23.79 miles (38.29 km) | Paterson-Hamburg Turnpike (CR 504) in Wayne | Palisades Boulevard (US 9W) in Alpine | |
| County Route 502 Truck | 0.75 miles (1.21 km) | Franklin Turnpike in Ho-Ho-Kus | Sheridan Ave in Ho-Ho-Kus | |
| County Route 503 | 17.95 miles (28.89 km) | Paterson Plank Road (NJ 120) in Carlstadt | New York state line in Montvale | |
| County Route 504 | 15.94 miles (25.65 km) | Main Street in Montville | McLean Boulevard (NJ 20) in Paterson | |
| County Route 505 | 20.64 miles (33.22 km) | John F. Kennedy Boulevard (CR 501) in Union City | New York state line in Northvale | |
| County Route 506 | 10.74 miles (17.28 km) | Oak Road (NJ 159) in Fairfield | Rutgers Street (NJ 7)/McCarter Highway (NJ 21) in Belleville | |
| County Route 506 Spur | 4.30 miles (6.92 km) | Highland Avenue (CR 506) in Glen Ridge | McCarter Highway (NJ 21) in Newark | |
| County Route 507 | 28.34 miles (45.61 km) | Harrison Avenue (CR 508) on the Kearny-Harrison town line | New York state line in Mahwah | |
| County Route 508 | 16.14 miles (25.97 km) | Mount Pleasant Avenue (NJ 10) in Livingston | Belleville Turnpike (NJ 7) in Kearny | |
| County Route 508 Spur | 0.31 miles (0.50 km) | Northfield Avenue in West Orange | Main Street in West Orange | |
| County Route 509 | 25.78 miles (41.49 km) | North Avenue (NJ 28) in Westfield | Straight Street (CR 504) in Paterson | |
| County Route 509 Spur | 2.98 miles (4.80 km) | Broad Street (CR 509) in Westfield | Morris Avenue (NJ 82) in Springfield | |
| County Route 510 | 29.58 miles (47.60 km) | North Road (CR 513) in Chester | McCarter Highway (NJ 21) in Newark | |
| County Route 511 | 37.44 miles (60.25 km) | Columbia Avenue (CR 510) in Morris Township | New York state line in West Milford | |
| County Route 511 Alternate | 9.77 miles (15.72 km) | Boonton Turnpike (US 202/NJ 23) in Wayne | Union Avenue (CR 511) in Wanaque | |
| County Route 512 | 32.96 miles (53.04 km) | High Bridge Road (CR 513) in Califon | Springfield Avenue (CR 527) in Summit | |
| County Route 513 | 66.83 miles (107.55 km) | Kingwood Avenue (NJ 12) in Frenchtown | Lakeside Road (CR 511) in West Milford | |
| County Route 514 | 42.86 miles (68.98 km) | US 202 in East Amwell | Bayway Avenue (NJ 439) in Elizabeth | |
| County Route 515 | 13.06 miles (21.02 km) | NJ 23 in Hardyston Township | New York state line in Vernon Township | |
| County Route 516 | 19.27 miles (31.01 km) | NJ 18 in Old Bridge Township | NJ 36 in Middletown Township | |
| County Route 517 | 54.07 miles (86.68 km) | Lamington Road (CR 523) in Tewksbury Township | New York state line in Vernon Township | |
| County Route 518 | 20.58 miles (33.12 km) | Old York Road (NJ 165) in Lambertville | Lincoln Highway (NJ 27) in Franklin | |
| County Route 519 | 88.54 miles (142.49 km) | Daniel Bray Highway (NJ 29) in Delaware Township | New York state line in Wantage Township | |
| County Route 520 | 22.39 miles (36.03 km) | Englishtown Road (CR 527) in Old Bridge Township | Ocean Avenue (NJ 36) in Sea Bright | |
| County Route 521 | 43.71 miles (70.34 km) | High Street (CR 519) in Hope Township | New York state line in Montague Township | |
| County Route 522 | 19.64 miles (31.61 km) | US 1 in South Brunswick Township | Main Street (CR 537) in Freehold Borough | |
| County Route 523 | 29.07 miles (46.78 km) | Main Street (NJ 29) in Stockton | Hillside Avenue (US 202) in Bedminster Township | |
| County Route 524 | 39.90 miles (64.21 km) | Whitehorse Road (US 206) in Hamilton | NJ 71 in Spring Lake Heights | |
| County Route 524 Alternate | 3.74 miles (6.02 km) | Adelphia-Farmingdale Road (CR 524) in Howell | Lakewood-Farmingdale Road (CR 524/CR 547) in Howell | |
| County Route 524 Spur | 3.39 miles (5.46 km) | Allenwood Road (CR 524) in Wall Township | Broad Street (CR 20) in Manasquan | |
| County Route 525 | 16.88 miles (27.17 km) | Union Avenue (NJ 28) in Bound Brook | Main Street (CR 510) in Mendham | |
| County Route 526 | 35.56 miles (57.23 km) | Princeton-Hightstown Road (CR 571) in West Windsor, signed to Nassau Street (NJ 27) in Princeton | Lanes Mill Road (CR 549) in Lakewood Township | |
| County Route 526 Spur | 0.44 miles (1 km) | Allentown - Red Valley Road (CR 526) in Upper Freehold Township | Old York Road (CR 524/CR 539) in Upper Freehold Township | |
| County Route 527 | 85.22 miles (137.15 km) | Main Street (NJ 166) in Toms River Township | Pompton Avenue (NJ 23) in Cedar Grove | |
| County Route 527 Alternate | 5.88 miles (9.46 km) | Sweetmans Lane (CR 527) in Millstone Township | Millhurst Road (CR 527) in Manalapan | |
| County Route 528 | 39.89 miles (64.20 km) | Farnsworth Avenue (CR 545) in Bordentown | Ocean Avenue (NJ 35) in Mantoloking | |
| County Route 529 | 10.57 miles (17.01 km) | Woodbridge Avenue (CR 514) in Edison | Mountain Boulevard (CR 527) in Watchung | |
| County Route 530 | 31.21 miles (50.23 km) | US 206 in Southampton Township | Water Street (NJ 166) in Toms River Township | |
| County Route 531 | 13.61 miles (21.90 km) | Woodbridge Avenue (CR 514) in Edison | Valley Road (CR 512) in Long Hill Township | |
| County Route 532 | 35.19 miles (56.63 km) | Stokes Road (CR 541) on the Medford Township-Medford Lakes town line | Bryan Road (US 9) in Ocean Township | |
| County Route 533 | 32.36 miles (52.08 km) | Broad Street (US 206) in Hamilton Township | Mountain Avenue (CR 527) in Bound Brook | |
| County Route 533 Bypass | 0.45 miles (0.72 km) | Millstone Bypass (CR 514) in Millstone | Millstone River Road (CR 533) in Hillsborough Township | |
| County Route 534 | 22.21 miles (35.74 km) | NJ 47 in Deptford Township | Medford-Indian Mills Road in Shamong Township | |
| County Route 535 | 31.75 miles (51.10 km) | Logan Avenue at the Trenton-Hamilton Township city line | Intersection of Main Street and Raritan Street in Sayreville | |
| County Route 536 | 38.52 miles (61.99 km) | Pennsylvania state line in Logan Township | US 206 in Hammonton | |
| County Route 536 Spur | 7.57 miles (12.18 km) | Black Horse Pike (US 322/NJ 42) in Monroe Township | NJ 73 in Winslow Township | |
| County Route 537 | 67.91 miles (109.29 km) | Delaware Avenue in Camden | Myrtle Avenue in Long Branch | |
| County Route 537 Spur | 1.08 miles (1.74 km) | Delaware Avenue in Camden | CR 537 in Camden | |
| County Route 538 | 24.10 miles (38.79 km) | Kings Highway (CR 551) in Swedesboro | Black Horse Pike (US 322) in Monroe Township | |
| County Route 539 | 53.49 miles (86.08 km) | Main Street (US 9) in Tuckerton | US 130 in Cranbury Township | |
| County Route 540 | 43.16 miles (69.46 km) | Intersection of Slapes Corner Road (NJ 140) and Wiley Road (US 40) in Carneys Point Township | Harding Highway (US 40) in Buena Vista Township | |
| County Route 541 | 31.21 miles (50.23 km) | US 206 in Shamong Township | US 130 in Burlington | |
| County Route 541 Truck | 1.49 miles (2.40 km) | Cadillac Road in Burlington Township | Jacksonville Road in Burlington | |
| County Route 542 | 20.57 miles (33.10 km) | NJ 54 in Hammonton | US 9 in Bass River Township | |
| County Route 543 | 28.77 miles (46.30 km) | Federal Street (CR 537) in Camden | Wrightstown-Georgetown Road (CR 545) in Mansfield Township | |
| County Route 544 | 14.94 miles (24.04 km) | Cooper Street (CR 534) in Deptford Township | Taunton Boulevard in Medford Township | |
| County Route 545 | 14.76 miles (23.75 km) | Lakehurst Road (CR 530) in Pemberton Township | Park Avenue in Bordentown | |
| County Route 546 | 9.98 miles (16.06 km) | NJ 29 in Hopewell Township | US 1 in Lawrence Township | |
| County Route 547 | 28.29 miles (45.53 km) | NJ 70 in Lakehurst | Broad Street (NJ 71) in Eatontown | |
| County Route 548 | 9.18 miles (14.77 km) | Delsea Drive (NJ 47) in Maurice River Township | NJ 49 in Upper Township | |
| County Route 549 | 17.82 miles (28.68 km) | Main Street (NJ 166) in Toms River Township | Lakewood-Farmingdale Road (CR 547) in Howell Township | |
| County Route 549 Spur | 3.97 miles (6.39 km) | Lakewood Road (NJ 88) in Point Pleasant | Sally Ike Road (CR 549) in Brick Township | |
| 4.09 miles (6.58 km) | NJ 37 in Toms River | Hooper Avenue (CR 549) in Toms River Township | ||
| County Route 550 | 15.92 miles (25.62 km) | Delsea Drive (NJ 47) in Maurice River Township | Shore Drive (US 9) in Dennis Township | |
| County Route 550 Spur | 4.84 miles (7.79 km) | Delsea Drive (NJ 47) in Dennis Township | Hoffman's Mill Road (CR 550) in Dennis Township | |
| County Route 551 | 34.57 miles (55.64 km) | Pennsville-Salem Road (NJ 49) in Pennsville Township | Penn Street (I-676/US 30) in Camden | |
| County Route 551 Spur | 4.27 miles (6.87 km) | Broadway (US 130) in Brooklawn | Clements Bridge Road (NJ 41) in Haddonfield | |
| County Route 552 | 27.48 miles (44.22 km) | Laurel Street in Bridgeton | Harding Highway (US 40) in Hamilton Township | |
| County Route 552 Spur | 3.41 miles (5.49 km) | Third Street (CR 555) in Millville | Sherman Avenue (CR 552) in Vineland | |
| County Route 553 | 51.22 miles (82.43 km) | Hands Landing Road in Commercial Township | Broadway (CR 551) in Deptford Township | |
| County Route 553 Alternate | 6.19 miles (9.96 km) | Heston Street (CR 553) in Glassboro | Bridgeton Pike (NJ 45) in Mantua Township | |
| County Route 554 | 6.16 miles (9.91 km) | Barnegat Boulevard (NJ 72) in Barnegat Township | Main Street (US 9) in Barnegat Township | |
| County Route 555 | 34.20 miles (55.04 km) | Port Norris Road (CR 553) in Downe Township | Black Horse Pike (NJ 42) in Washington Township | |
| County Route 557 | 36.00 miles (57.94 km) | Delsea Drive (NJ 47) in Dennis Township | Main Street (CR 555) in Franklin Township | |
| County Route 557 Truck | 18.40 miles (30 km) | CR 557 in Estell Manor | US 40/CR 557 in Buena Vista Township | |
| County Route 559 | 30.84 miles (49.63 km) | MacArthur Boulevard (NJ 52) in Somers Point | Egg Harbor Road (CR 561) in Hammonton | |
| County Route 559 Alternate | 9.49 miles (15.27 km) | Shore Road (CR 585) on the Linwood-Somers Point town line | Somers Point-Mays Landing Road (CR 559) in Hamilton Township | |
| County Route 560 | 5.05 miles (8.13 km) | PA 739 on the Pennsylvania state line in Sandyston Township | US 206 in Sandyston Township | |
| County Route 561 | 51.05 miles (82.16 km) | New York Road (US 9) in Galloway Township | Federal Street (CR 537) in Camden | |
| County Route 561 Alternate | 15.79 miles (25.41 km) | Dead end at Oyster Creek Road in Galloway Township | Duerer Street (CR 561) in Mullica Township | |
| County Route 561 Spur | 8.50 miles (13.68 km) | US 322/NJ 73 in Folsom | NJ 73/CR 561 in Winslow Township | |
| County Route 563 | 43.87 miles (70.60 km) | Ventnor Avenue in Margate | NJ 72 in Woodland Township | |
| County Route 565 | 17.86 miles (28.74 km) | Intersection of US 206 and NJ 15 in Frankford Township | McAfee Road (CR 517) in Vernon Township | |
| County Route 567 | 10.02 miles (16.13 km) | Amwell Road (CR 514) in Hillsborough Township | Union Avenue (NJ 28) in Raritan Borough | |
| County Route 569 | 8.53 miles (13.73 km) | Quakerbridge Road (CR 533) in Lawrence Township | Broad Street (CR 518) in Hopewell Borough | |
| County Route 571 | 44.06 miles (70.91 km) | NJ 37 in Toms River Township | NJ 27 in the Borough of Princeton | |
| County Route 573 | 5.73 miles (9.22 km) | Black Horse Pike (NJ 168) in Runnemede | Brace Road (NJ 154) in Cherry Hill Township | |
| County Route 575 | 20.96 miles (33.73 km) | Somers Point-Mays Landing Road (CR 559) in Egg Harbor Township | New York Road (US 9) in Port Republic | |
| County Route 577 | 9.96 miles (16.03 km) | Springfield Avenue (NJ 124) in Springfield Township | Bloomfield Avenue (CR 506) in Verona | |
| County Route 579 | 37.24 miles (59.93 km) | John Fitch Parkway (NJ 29) in Trenton | NJ 173 in Greenwich Township | |
| County Route 581 | 17.57 miles (28.28 km) | Main Street (NJ 49) in Quinton | Bridgeton Pike (NJ 77) in Harrison Township | |
| County Route 583 | 9.11 miles (14.66 km) | Calhoun Street (US 206) in Trenton | Nassau Street (NJ 27) in Princeton | |
| County Route 585 | 9.57 miles (15.40 km) | MacArthur Boulevard (NJ 52) in Somers Point | Absecon Boulevard (US 30) in Absecon | |
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