# List of county routes in Middlesex County, New Jersey

The following is a list of county routes in Middlesex 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 Middlesex County:
* CR 501, CR 514, CR 516, CR 520, CR 522, CR 527, CR 529, CR 531, CR 535, CR 539

## Other county routes

| Route | Length (mi) | Length (km) | From | Via | To | Notes |
| CR 601 | 1.70 | 2.74 | CR 665 in Piscataway | Vail Avenue, West 7th Street | CR 601 at the Union County line on the Piscataway/South Plainfield border | |
| CR 602 (I) | 6.21 | 9.99 | CR 603 in South Plainfield | Maple Avenue, Old Raritan Road, Inman Avenue | CR 602 at the Union County line in Woodbridge | |
| CR 602 (II) | 3.54 | 5.70 | CR 621 / Randolph Avenue at the Union County line in Woodbridge | Randolph Avenue, Roosevelt Avenue | CR 604 in Carteret | |
| CR 603 | 4.09 | 6.58 | CR 529 in South Plainfield | Hamilton Boulevard, Lakeview Avenue, Plainfield Avenue | CR 603 at the Union County line in South Plainfield | |
| CR 603 Spur | 0.07 | 0.11 | CR 603 in South Plainfield | Hamilton Boulevard | Dead end in South Plainfield | |
| CR 604 | 10.88 | 17.51 | CR 531 in South Plainfield | Oak Tree Road, Green Street, Rahway Avenue, Port Reading Avenue, Roosevelt Avenue, Washington Avenue | CR 602 / Holmes Street in Carteret | |
| CR 605 | 1.15 | 1.85 | CR 601 on the South Plainfield/Piscataway border | Clinton Avenue | CR 663 in South Plainfield | |
| CR 606 | 4.78 | 7.69 | CR 535 / Hillside Avenue in South River | Hillside Avenue, Milltown Road | Route 171 in North Brunswick | |
| CR 606 Spur | 0.12 | 0.19 | CR 606 in East Brunswick | Milltown Road | Route 18 in East Brunswick | |
| CR 607 | 2.69 | 4.33 | CR 533 at the Somerset County line in Middlesex | Lincoln Boulevard, South Lincoln Avenue | Route 28 in Middlesex | |
| CR 608 | 2.36 | 3.80 | Route 27 in North Brunswick | Cozzens Lane, Adams Lane | CR 695 in North Brunswick | |
| CR 609 | 4.08 | 6.57 | CR 617 at the Somerset County line in New Brunswick | Landing Lane, River Road, Metlars Lane | CR 529 in Piscataway | |
| CR 609 Spur | 0.07 | 0.11 | CR 527 in New Brunswick | Landing Lane | CR 609 in New Brunswick | |
| CR 610 | 6.55 | 10.54 | Route 27 in South Brunswick | Henderson Road, Deans Lane, Deans Rhode Hall Road | CR 535 in South Brunswick | |
| CR 611 | 4.23 | 6.81 | CR 616 / CR 656 / State Street in Perth Amboy | State Street, West Avenue | CR 604 in Woodbridge | |
| CR 612 | 5.01 | 8.06 | Route 32 at the bridge over the New Jersey Turnpike (I-95) in Monroe Township | Forsgate Drive, Buckelew Avenue, Pergola Avenue, Matchaponix Avenue | CR 613 in Monroe Township | |
| CR 613 | 9.30 | 14.97 | CR 522 / Tracy Station Road in Monroe Township | Spotswood-Englishtown Road, Spotswood Road, Devoe Avenue, Main Street, Summerhill Road | CR 535 in East Brunswick | |
| CR 613 Spur | 0.09 | 0.14 | CR 535 / CR 613 in East Brunswick | Hope Road | Route 18 in East Brunswick | |
| CR 614 | 12.77 | 20.55 | U.S. Route 1 in Plainsboro Township | Scudders Mill Road, Dey Road, Cranbury-South River Road, Prospect Plains Road, Hoffman Station Road | CR 522 / Mounts Mill Road in Monroe Township | |
| CR 614 (I) | 0.31 | 0.50 | CR 614 / Dey Road in Plainsboro | Scudders Mill Road | Plainsboro Road in Plainsboro | |
| CR 614 (II) | 0.87 | 1.40 | CR 535 in Cranbury | North Main Street | U.S. Route 130 in Cranbury | |
| CR 614 Connector | 0.16 | 0.26 | CR 614 Spur in Plainsboro | | CR 614 Spur / Plainsboro Road in Plainsboro | Jughandle |
| CR 615 | 23.44 | 37.72 | CR 615 at the Mercer County line in Plainsboro | Cranbury Neck Road, South Main Street, Station Road, Union Valley Road, Union Valley Half Acre Road, Prospect Plains Road, Half Acre Road, Lincoln Avenue, Helmetta Road, Main Street, Bordentown Avenue | Bordentown Avenue / South Pine Avenue in South Amboy | |
| CR 615 Spur | 0.16 | 0.26 | Hooker Street on the Jamesburg/Monroe Township border | Hooker Street | CR 615 in Jamesburg | |
| CR 616 | 3.02 | 4.86 | CR 501 / CR 616 Spur in Woodbridge Township | New Brunswick Avenue | CR 656 / State Street in Perth Amboy | |
| CR 616 Spur | 0.19 | 0.31 | King Georges Post Road on the Edison/Woodbridge township line | King Georges Post Road | CR 501 / CR 616 on the Edison/Woodbridge township line | |
| CR 617 | 7.36 | 11.84 | CR 527 in East Brunswick | Rues Lane, Ryders Lane | Route 172 in New Brunswick | |
| CR 618 | 1.14 | 1.83 | Route 27 in South Brunswick | Old Road | Dead end in South Brunswick | Follows the Franklin Township, Somerset County-South Brunswick, Middlesex County line; also known as Somerset CR 607 |
| CR 619 | 6.39 | 10.28 | Disbrow Hill Road in Monroe Township | Butcher Road, Applegarth Road | CR 612 in Monroe Township | Formerly extended north to CR 698 |
| CR 620 | 0.28 | 0.45 | Dead end in North Brunswick | Nassau Street | Route 171 in North Brunswick | Decommissioned |
| CR 621 | 0.17 | 0.27 | North Feltus Street in South Amboy | 5th Street | CR 686 in South Amboy | |
| CR 622 | 7.44 | 11.97 | Route 27 in Highland Park | River Road, Lincoln Boulevard, Raritan Avenue | Route 28 in Middlesex | Former CR 514 Spur |
| CR 623 | 0.40 | 0.64 | Route 28 in Dunellen | Jefferson Avenue | Jefferson Avenue at the Somerset County line in Dunellen | |
| CR 624 | 0.90 | 1.45 | CR 656 in Woodbridge | Fayette Street, Route 440 Connector | Fayette Street in Perth Amboy | |
| CR 625 | 5.97 | 9.61 | Route 33 in Monroe Township | Perrineville Road | CR 612 in Jamesburg | |
| CR 625 (I) | 0.57 | 0.92 | CR 612 in Jamesburg | Railroad Avenue | CR 615 in Jamesburg | |
| CR 625 (II) | 0.21 | 0.34 | CR 522 in Jamesburg | Hooker Street | McKnight Avenue in Jamesburg | |
| CR 626 | 2.10 | 3.38 | Aberdeen Road at the Monmouth County line in Old Bridge | Morristown Road, Matawan Road, Laurence Parkway | Route 35 in Old Bridge | |
| CR 627 | 0.17 | 0.27 | Somerset Street on the New Brunswick-Franklin Township line | Somerset Street | Somerset Street (Mile Run bridge) on the New Brunswick-Franklin Township line | On the New Brunswick, Middlesex County-Franklin Township, Somerset County line |
| CR 628 | 0.27 | 0.43 | Dead end in Piscataway | South 2nd Street | South 2nd Street / Oak Place at the Union County line in Piscataway | |
| CR 629 | 0.69 | 1.11 | Route 440 / St. Stephens Avenue / Sunnyview Oval in Woodbridge | Crows Mill Road | CR 501 in Woodbridge | |
| CR 630 | 1.11 | 1.79 | U.S. Route 1 in Edison | Parsonage Road | Route 27 in Edison | |
| CR 630 Spur | 0.07 | 0.11 | CR 630 in Edison | | CR 657 in Edison | Jughandle |
| CR 631 | 1.86 | 2.99 | Marlboro Road in Old Bridge | Marlboro Road | Charles Street in Old Bridge | Formerly CR 700 |
| CR 632 | 2.42 | 3.89 | CR 622 in Piscataway | Johnson Drive | CR 622 in Highland Park | Formerly part of CR 807; Johnson Park road |
| CR 632 (A) | 0.18 | 0.29 | CR 632 in Piscataway | Violet Drive | CR 622 in Piscataway | Formerly CR 807; Johnson Park road |
| CR 632 (B) | 0.16 | 0.26 | CR 632 in Piscataway | | CR 622 in Piscataway | Johnson Park road |
| CR 632 (C) | 0.10 | 0.16 | CR 632 in Piscataway | Tulip Drive | Parking lot in Piscataway | Johnson Park road |
| CR 632 (D) | 0.06 | 0.10 | CR 632 in Piscataway | Tulip Drive | CR 632 in Piscataway | Johnson Park road |
| CR 632 (E) | 0.15 | 0.24 | CR 632 in Highland Park | Rose Drive | CR 622 in Highland Park | Johnson Park road |
| CR 642 | 0.41 | 0.66 | U.S. Route 130/CR 697 in South Brunswick | Old Georges Road | U.S. Route 130 in South Brunswick | |
| CR 643 | 1.07 | 1.72 | CR 604 in Woodbridge | Middlesex Avenue | Middlesex Avenue on the Woodbridge-Carteret line | The remainder of Middlesex Avenue and Peter J. Sica Industrial Highway is planned to become an extension of CR 643 |
| CR 644 | 0.85 | 1.37 | Route 27 in New Brunswick | French Street | Route 27 / CR 527 in New Brunswick | County-maintained section of Route 27 |
| CR 645 | 1.59 | 2.56 | CR 516 in Old Bridge | Amboy Road | Route 34 in Old Bridge | Formerly part of CR 689 |
| CR 646 | 1.05 | 1.69 | CR 514 in Woodbridge | Woodbridge Center Drive | U.S. Route 1 in Woodbridge | |
| CR 647 | 2.53 | 4.07 | CR 529 in Piscataway | New Brunswick Avenue | CR 601 on the Piscataway-South Plainfield line | |
| CR 648 | 1.51 | 2.43 | CR 501 in Edison | Ford Avenue | U.S. Route 1 in Woodbridge | |
| CR 649 | 2.84 | 4.57 | Garden State Parkway in Woodbridge | Wood Avenue | CR 602 on the Edison/Woodbridge township line | |
| CR 650 | 3.81 | 6.13 | CR 604 in Woodbridge | Middlesex Avenue, New Dover Road, Chain O'Hills Road, Avenel Street | CR 514 in Woodbridge | Decommissioned |
| CR 651 | 1.03 | 1.66 | CR 650 in Woodbridge | Colonia Boulevard | Bramhall Road in Woodbridge | Decommissioned |
| CR 652 | 1.01 | 1.63 | Railroad crossing in Woodbridge | Woodbridge Avenue, Berry Street | CR 514 in Woodbridge | |
| CR 653 | 2.17 | 3.49 | CR 616 in Perth Amboy | Amboy Avenue | Route 35 in Woodbridge | |
| CR 654 | 0.50 | 0.80 | CR 653 in Perth Amboy | Maurer Road | CR 611 in Perth Amboy | Decommissioned in 2013 though a 0.16-mile (0.26 km) is still designated and open |
| CR 655 | 2.08 | 3.35 | CR 654 in Perth Amboy | Florida Grove Road | Route 35 on the Perth Amboy/Woodbridge line | |
| CR 656 | 4.21 | 6.78 | Dead end in Edison | Riverside Drive, Smith Street | Front Street in Perth Amboy | Discontinuous through Route 440 interchange |
| CR 656 Spur | 0.53 | 0.85 | Raritan Center Parkway in Edison | Parkway Place | CR 656 in Woodbridge | |
| CR 657 | 2.90 | 4.67 | Oakwood Avenue at the Metuchen-Edison line | Oakwood Avenue, Maple Drive, Roosevelt Drive, Thornall Road, Middlesex-Essex Turnpike | CR 604 in Woodbridge | |
| CR 657 (I) | 0.35 | 0.56 | CR 657 in Edison | Roosevelt Drive | CR 657 in Edison | |
| CR 657 (II) | 0.13 | 0.21 | CR 657 in Edison | Oakwood Avenue | Route 27 in Edison | |
| CR 657 (A) | 0.36 | 0.58 | CR 660 in Edison | Pine Drive | CR 657 in Edison | Roosevelt Park road |
| CR 657 (B) | 0.48 | 0.77 | Dead end in Edison | Lafayette Avenue | CR 630 in Edison | Roosevelt Park road |
| CR 657 (C) | 0.07 | 0.11 | CR 657 in Edison | Pine Drive | CR 657 in Edison | Roosevelt Park road |
| CR 657 (D) | 0.42 | 0.68 | CR 657 in Edison | Birch Street | CR 657 in Edison | Roosevelt Park road |
| CR 657 (E) | 0.12 | 0.19 | CR 657 in Edison | Elm Drive | CR 657 in Edison | Roosevelt Park road |
| CR 657 (F) | 0.14 | 0.23 | CR 657 in Edison | Elm Drive | CR 657 in Edison | Roosevelt Park road |
| CR 657 (G) | 0.52 | 0.84 | CR 657 in Edison | Oak Drive | CR 630 in Edison | Roosevelt Park road |
| CR 657 (H) | 0.16 | 0.26 | CR 657 in Edison | | Dead end in Edison | Roosevelt Park road |
| CR 657 (J) | 0.04 | 0.06 | CR 657 in Edison | Maple Drive | CR 657 in Edison | Roosevelt Park road |
| CR 657 (K) | 0.03 | 0.05 | CR 657 in Edison | | Parking lot in Edison | Roosevelt Park road |
| CR 657 (L) | 0.02 | 0.03 | CR 657 in Edison | | Parking lot in Edison | Roosevelt Park road |
| CR 657 (M) | 0.02 | 0.03 | CR 657 in Edison | | Dead end in Edison | Roosevelt Park road |
| CR 658 | 1.47 | 2.37 | CR 656 in Perth Amboy | Herbert Street, Market Street, Water Street | CR 656 in Perth Amboy | |
| CR 659 | 0.49 | 0.79 | CR 535 in Cranbury | Maplewood Avenue | CR 535 in Cranbury | |
| CR 659 (I) | 0.42 | 0.68 | CR 657 in Edison | Birch Street | CR 657 in Edison | Now CR 657D |
| CR 659 (II) | 0.36 | 0.58 | CR 660 in Edison | Pine Drive | CR 657 in Edison | Now CR 657A |
| CR 659 (III) | 0.22 | 0.35 | Oakwood Avenue in Edison | Maple Drive | CR 657 in Edison | Now part of CR 657 |
| CR 659 (IV) | 0.52 | 0.84 | CR 657 in Edison | Oak Drive | CR 630 in Edison | Now CR 657G |
| CR 660 | 1.15 | 1.85 | CR 531 in Metuchen | Woodbridge Avenue, Grandview Avenue | U.S. Route 1 in Edison | |
| CR 661 | 1.08 | 1.74 | CR 531 in Edison | Plainfield Road | CR 604 in Edison | |
| CR 663 | 1.75 | 2.82 | CR 603 in South Plainfield | South Clinton Avenue, New Market Avenue, Clinton Avenue | CR 605 in South Plainfield | |
| CR 665 | 3.71 | 5.97 | CR 609 in Piscataway | Washington Avenue, Stelton Road, New Market Road | CR 529 in Dunellen | |
| CR 667 | 0.69 | 1.11 | CR 514 in Edison | Mill Road | Mill Road in Edison | |
| CR 667 Spur | 0.94 | 1.51 | Dead end in Edison | West Patrol Road | CR 667 in Edison | |
| CR 669 | 0.71 | 1.14 | CR 501 in Metuchen | Central Avenue | CR 531 in Metuchen | |
| CR 670 | 5.03 | 8.10 | CR 535 in Sayreville | Main Street, Washington Avenue | CR 684 in South Amboy | |
| CR 671 | 0.55 | 0.89 | CR 601 in Piscataway | Rock Avenue | Rock Avenue at the Union County line in Piscataway | Decommissioned |
| CR 672 | 2.18 | 3.51 | Route 172 / CR 527 / Paul Robeson Boulevard in New Brunswick | George Street | CR 609 in New Brunswick | Gap in route at Route 18 |
| CR 673 | 1.19 | 1.92 | CR 535 in Sayreville | Ernston Road | U.S. Route 9 on the Sayreville/Old Bridge line | |
| CR 674 | 0.49 | 0.79 | CR 609 in Piscataway | Suttons Lane | School Street / Suttons Lane in Piscataway | Decommissioned |
| CR 675 (I) | 2.45 | 3.94 | CR 615 in Sayreville | Jernee Mill Road | CR 535 in Sayreville | |
| CR 675 (II) | 0.21 | 0.34 | Dead end in Sayreville | Washington Street, Furman Avenue | CR 675 in Sayreville | |
| CR 675 (III) | 0.34 | 0.55 | CR 675 in South River | Water Street, Causeway | Dead end in South River | |
| CR 675 (IV) | 0.65 | 1.05 | CR 535 in South River | Jackson Street, Water Street | CR 535 in South River | |
| CR 676 | 0.49 | 0.79 | CR 514 on the Highland Park–Edison line | Duclos Lane | Route 27 in Edison | Formerly extended south to US 1 along Riverview and north to Truman Drive along Suttons Lane |
| CR 677 | 3.86 | 6.21 | CR 615 in East Brunswick | River Road, Whitehead Avenue, Reid Street, Prospect Street | CR 527 / West Prospect Street on the South River-East Brunswick line | |
| CR 678 | 0.80 | 1.29 | Prospect Street in Dunellen | Walnut Street | CR 601 in Piscataway | |
| CR 679 | 4.16 | 6.69 | U.S. Route 130 in South Brunswick | Georges Road | U.S. Route 130 in South Brunswick | Now part of CR 697 and CR 697 Spur |
| CR 680 | 0.99 | 1.59 | Route 27 on the North Brunswick-New Brunswick line | How Lane | Route 26 in North Brunswick | |
| CR 681 | 0.68 | 1.09 | CR 522 in South Brunswick | Kingston Lane | CR 697 in South Brunswick | |
| CR 682 | 1.05 | 1.69 | Route 27 on the North Brunswick/South Brunswick line | Finnegans Lane | U.S. Route 1 on the North Brunswick/South Brunswick township line | |
| CR 683 | 2.03 | 3.27 | CR 614 in Plainsboro | Schalks Crossing Road | Ridge Road in South Brunswick | Formerly extended south to Plainsboro Road |
| CR 684 | 1.73 | 2.78 | U.S. Route 9 in South Amboy | Main Street | Route 35 in Sayreville | |
| CR 685 | 0.40 | 0.64 | CR 535 / CR 539 in Cranbury | Old Trenton Road | U.S. Route 130 in Cranbury | Formerly extended south along South Main Street to US 130 |
| CR 686 | 1.10 | 1.77 | CR 684 in South Amboy | 4th Street, North Stevens Avenue, Ridgeway Avenue, Scott Avenue | CR 684 in Sayreville | |
| CR 686 Spur | 0.24 | 0.39 | U.S. Route 9/Route 35 / CR 535 in South Amboy | Raritan Street | CR 686 in South Amboy | |
| CR 687 | 1.60 | 2.57 | CR 516 / Cottrell Road in Old Bridge | Cottrell Road | Route 34 in Old Bridge | |
| CR 688 | 0.95 | 1.53 | Ramps from Route 35 in Sayreville | South Pine Avenue | CR 615 in South Amboy | Decommissioned |
| CR 689 | 1.45 | 2.33 | Route 34 in Old Bridge | Morristown Road, Cliffwood Road | CR 6A at the Monmouth County line in Old Bridge | |
| CR 690 | 0.91 | 1.46 | CR 520 in Old Bridge | Texas Road | Texas Road at the Monmouth County line in Old Bridge | |
| CR 691 | 1.32 | 2.12 | Route 26 in New Brunswick | Livingston Avenue | New Street in New Brunswick | |
| CR 692 | 1.22 | 1.96 | CR 622 in Highland Park | Cedar Lane | Kilmer Road in Edison | |
| CR 693 | 1.10 | 1.77 | Route 91 in New Brunswick | Jersey Avenue | Route 27 in New Brunswick | |
| CR 694 | 0.83 | 1.34 | CR 695 in North Brunswick | Church Lane | Riva Avenue / Church Lane in East Brunswick | |
| CR 695 | 1.41 | 2.27 | Blackhorse Lane in North Brunswick | Old Georges Road | U.S. Route 130 in North Brunswick | Three separate segments separated by US 130 |
| CR 696 | 0.49 | 0.79 | U.S. Route 130 in North Brunswick | Apple Orchard Lane | County Workhouse in North Brunswick | |
| CR 697 | 4.32 | 6.95 | U.S. Route 130 in South Brunswick | Georges Road, Distribution Way | U.S. Route 130 / CR 642 in South Brunswick | |
| CR 697 Spur | 0.25 | 0.40 | CR 697 in South Brunswick | Georges Road | U.S. Route 130 in South Brunswick | Former CR 679 |
| CR 698 | 0.42 | 0.68 | Docks Corner Road / Possum Hollow Road in Jamesburg | Docks Corner Road | CR 522 in Jamesburg | Formerly extended west to CR 535 |
| CR 699 | 0.71 | 1.14 | CR 687 in Old Bridge | Spring Hill Road | Route 34 in Old Bridge | |
| CR 700 | 2.50 | 4.02 | Route 18 in Old Bridge | Marlboro Road, Charles Street | Marsad Drive in Old Bridge | Decommissioned, now partially CR 631 |
| CR 701 | 1.17 | 1.88 | CR 609 in Piscataway | Avenue E | CR 702 in Edison | Decommissioned |
| CR 702 | 0.74 | 1.19 | CR 692 in Edison | Road 1 | Dead end in Edison | Decommissioned |
| CR 807 | 1.18 | 1.90 | CR 622 in Highland Park | Johnson Drive, Violet Drive | CR 622 in Piscataway | Decommissioned, now CR 632 |
| CR 1605 | 0.03 | 0.05 | Parking lot in Highland Park | | CR 1640 in Highland Park | Donaldson Park road |
| CR 1625 | 0.08 | 0.13 | Dead end in Highland Park | | CR 1650 in Highland Park | Donaldson Park road |
| CR 1630 | 0.10 | 0.16 | Riverview Avenue in Highland Park | Donaldson Drive | CR 1640 in Highland Park | Donaldson Park road |
| CR 1640 | 0.66 | 1.06 | Parking lot in Highland Park | Lily Drive, Donaldson Drive, Tulip Drive | Parking lot in Highland Park | Donaldson Park road |
| CR 1650 | 0.36 | 0.58 | CR 1640 in Highland Park | Donaldson Drive | CR 1640 in Highland Park | Donaldson Park road |
| CR 1665 | 0.07 | 0.11 | CR 1630 in Highland Park | Donaldson Drive | South 3rd Avenue in Highland Park | Donaldson Park road |
| CR 2110 | 0.12 | 0.19 | Parking lot in Woodbridge | South Middlesex Avenue | South Middlesex Avenue in Woodbridge | Merrill Park road |
| CR 2120 | 0.57 | 0.92 | Middlesex Turnpike in Woodbridge | Middlesex Turnpike, Fairview Avenue | CR 2130 in Woodbridge | Merrill Park road |
| CR 2130 | 0.06 | 0.10 | CR 2120 in Woodbridge | Outlook Avenue | Outlook Avenue in Woodbridge | Merrill Park road |
| CR 2135 | 0.05 | 0.08 | CR 2120 in Woodbridge | Apple Drive | CR 2110 in Woodbridge | Merrill Park road |
| CR 2138 | 0.02 | 0.03 | CR 2120 in Woodbridge | | CR 2165 in Woodbridge | Merrill Park road |
| CR 2140 | 0.16 | 0.26 | CR 2120 in Woodbridge | Cherry Drive | Parking lot in Woodbridge | Merrill Park road |
| CR 2145 | 0.06 | 0.10 | Parking lot in Woodbridge | Merrill Drive | CR 2120 in Woodbridge | Merrill Park road |
| CR 2165 | 0.13 | 0.21 | Parking lot in Woodbridge | | CR 2120 in Woodbridge | Merrill Park road |