- List of county routes in Somerset County, New Jersey
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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:
County routes in Somerset County
Route Length [1] South/West end North/East end Road Name(s) 
County Route 601 7.30 mi. Mercer Co. line in Montgomery Twp. US 206 in Montgomery Twp. Great Rd., Belle Mead-Blawenburg Rd., Trent Ave. 
County Route 602 0.52 mi. railroad tracks in Montgomery Twp. CR 601 in Montgomery Twp. Skillman Rd. 
County Route 603 1.85 mi. NJ 27 in Franklin Twp. CR 518 in Franklin Twp. Laurel Ave., Kingston-Rocky Hill Rd. 
County Route 604 1.50 mi. CR 601 in Montgomery Twp. US 206 in Montgomery Twp. Dutchtown-Harlington Rd. 
County Route 605 1.61 mi. Mercer Co. line in Franklin Twp. (continues as Mercer CR 605) CR 518 in Rocky Hill River Rd., Bridge St., Crescent Ave. 
County Route 606 0.26 mi. CR 567 in Branchburg Twp. CR 625 in Hillsborough Twp. Studdiford Dr. 
County Route 608 1.67 mi. US 206 in Hillsborough Twp. CR 533 in Manville Dukes Pkwy. 
County Route 609 1.91 mi. CR 533 in Montgomery Twp. US 206 in Montgomery Twp. Bridge Point Rd. 
County Route 610 1.05 mi. CR 623 in So. Bound Brook CR 527 in So. Bound Brook Edgewood Terr. 
County Route 612 1.34 mi. NJ 28 in Somerville CR 533/633 in Bridgewater Twp. E. Main St. 
County Route 613 5.62 mi. CR 512 in Bernards Twp. US 202 in Bernardsville Stonehouse Rd., Finley Ave., Childs Rd. 
County Route 614 2.13 mi. US 22 in Branchburg Twp. US 22/NJ 28 in Bridgewater Twp. Easton Tpke. 
County Route 615 5.23 mi. NJ 27 in Franklin Twp. CR 514 in Franklin Twp. S. Middlebush Rd. 
County Route 616 2.79 mi. CR 525 in Bridgewater Twp. CR 527 in Warren Twp. Washington Valley Rd. 
County Route 617 1.91 mi. NJ 27 in Franklin Twp. Middlesex Co. line in Franklin Twp. Franklin Blvd. 
County Route 618 3.58 mi. CR 525 in Warren Twp. CR 651 in Warren Twp. Mount Horeb Rd. 
County Route 619 3.05 mi. CR 514 in Franklin Twp. CR 527 in Franklin Twp. Cedar Grove Ln. 
County Route 620 9.24 mi. CR 665 in Bedminster Twp. CR 525 in Bridgewater Twp. Burnt Mills Rd., Washington Valley Rd. 
County Route 621 4.30 mi. CR 514 in Franklin Twp. CR 623 in So. Bound Brook Elizabeth Ave. 
County Route 622 1.46 mi. CR 653 in Warren Twp. Union Co. line in Warren Twp. (continues as Union CR 622) Mountain Ave. 
County Route 623 4.15 mi. CR 533 in Manville CR 527 in So. Bound Brook Wilhousky St., Manville Causeway, Weston Canal Rd., Canal Rd. 
County Route 624 1.03 mi. CR 525 in Bernards Twp. CR 657 in Bernards Twp. W. Oak St. 
County Route 625 8.27 mi. CR 514 in Hillsborough Twp. CR 626 in Raritan River Rd., Nevius St. 
County Route 626 1.04 mi. CR 567 in Raritan NJ 28 in Somerville Somerset St. 
County Route 627 3.34 mi. CR 625 in Hillsborough Twp. Roycefield Rd. in Hillsborough Twp. New Center Rd. 
County Route 628 0.09 mi. CR 671 in Peapack-Gladstone CR 647 in Peapack-Gladstone Jackson Ave. 
County Route 629 1.70 mi. CR 567 in Branchburg Twp. Hunterdon County line in Branchburg Twp. (continues as Hunt. CR 629) Pleasant Run Rd. 
County Route 630 2.71 mi. CR 533 in Montgomery Twp. US 206 in Montgomery Twp. Belle Mead-Griggstown Rd. 
County Route 631 0.34 mi. US 22 in North Plainfield CR 531 in Watchung Somerset St., Johnston Dr. 
County Route 632 3.28 mi. NJ 27 in Franklin Twp. CR 533 in Montgomery Twp. Bunker Hill Rd., Canal Rd., Causeway 
County Route 633 0.93 mi. CR 533/612 in Bridgewater Twp. US 22 in Bridgewater Twp. Finderne Ave. 
County Route 634 3.43 mi. Sebring Mills Rd. in Green Brook Twp. CR 645 in Green Brook Twp. Greenbrook Rd. 
County Route 635 0.48 mi. CR 533 in Bound Brook NJ 28 in Bound Brook Vosseller Ave. 
County Route 636 1.97 mi. CR 645 in North Plainfield CR 531 southbound in North Plainfield Greenbrook Rd. 
County Route 637 4.80 mi. CR 567 in Branchburg Twp. CR 614 in Branchburg Twp. Old York Rd., Readington Rd., Orr Dr. 
County Route 638 0.36 mi. CR 527 in Warren Twp. CR 651 in Warren Twp. Washington Valley Rd. 
County Route 639 2.61 mi. Grove St. in Bridgewater Twp. US 202/206 in Bridgewater Twp. N. Bridge St., Foothill St. 
County Route 640 2.25 mi. CR 512 in Bernards Twp. CR 613 in Bernards Twp. Lyons Rd., S. Finley Ave. 
County Route 641 2.39 mi. CR 614 in Branchburg Twp. CR 620 in Bedminster Twp. Burnt Mills Rd. 
County Route 642 1.51 mi. CR 531 southbound in North Plainfield US 22 in North Plainfield Mountain Ave. 
County Route 643 0.80 mi. CR 626 in Somerville US 22 in Somerville Mountain Ave. 
County Route 644 0.39 mi. dead end in Raritan NJ 28 in Raritan Frelinghuysen Ave. 
County Route 645 0.64 mi. Union Co. line in Green Brook Twp./North Plainfield US 22 in Green Brook Twp./North Plainfield Rock Ave. 
County Route 646 0.56 mi. US 202 in Branchburg Twp. CR 567 in Branchburg Twp. Chubb Way 
County Route 647 1.06 mi. CR 512 in Peapack-Gladstone Morris Co. line in Peapack-Gladstone Mendham Rd. 
County Route 648 1.34 mi. CR 615 in Franklin Twp. NJ 27 in Franklin Twp. Claremont Rd. 
County Route 649 0.98 mi. Union Co. line in North Plainfield US 22 in North Plainfield W. End Ave. 
County Route 650 0.79 mi. CR 514 in Hillsborough Twp. CR 533 in Millstone Amwell Rd., Amsterdam Rd. 
County Route 651 6.13 mi. Middlesex Co. line in Green Brook Twp. CR 512 in Bernards Twp. Warrenville Rd., Mount Bethel Rd., King George Rd. 
County Route 652 4.68 mi. US 202/206 in Bedminster Twp. CR 525 in Bernards Township Schley Mountain Road, Allen Road 
County Route 653 3.02 mi. CR 527/531 in Watchung Morris Co. line in Warren Twp. (continues as Morris CR 606) Stirling Rd. 
County Route 655 0.95 mi. Union Co. line in Watchung Union Co. line in Watchung New Providence Rd. 
County Route 657 2.07 mi. Morris Co. line in Bernards Twp. (continues as Morris CR 657) CR 624 in Bernards Twp. S. Maple Ave. 
County Route 659 2.48 mi. CR 525 in Bernardsville Dead ends as Chapin Rd. in Bernardsville Claremont Rd., Turnbull Ln., Bliss Rd., Chapin Rd. 
County Route 661 0.45 mi. US 206 in Peapack-Gladstone CR 512 in Peapack-Gladstone Holland Ave. 
County Route 663 0.06 mi. Union Co. line in Watchung CR 655 in Watchung Union Ave. 
County Route 665 4.15 mi. CR 614 in Branchburg Twp. CR 523 in Bedminster Twp. Lamington Rd., Rattle Snake Bridge Rd. 
County Route 667 0.99 mi. CR 567 in Hillsborough Twp. CR 567 in Branchburg Twp. Elm St., Maple Ave., Pleasant Run Rd. 
County Route 671 0.83 mi. CR 512 in Peapack-Gladstone Morris Co. line in Peapack-Gladstone (continues as Morris CR 671) Main St., Chester Rd. 
County Route 673 0.95 mi. CR 639 in Bridgewater Twp. Somerville Rd. in Bridgewater Twp. Vogt Dr. 
County Route 675 1.54 mi. Dead ends as Polhemus Rd. in Bridgewater Twp. US 22 in Bridgewater Twp. Polhemus Rd., Chimney Rock Rd. 
County Route 677 0.70 mi. CR 514 in Hillsborough Twp. CR 625 in Hillsborough Twp. Amwell Rd. 
County Route 679 1.56 mi. CR 637 in Branchburg Twp. CR 614 in Branchburg Twp. Station Rd. 
County Route 683 0.52 mi. CR 533 in Bridgewater Twp. CR 675/NJ 28 in Bridgewater Twp. Foothill Road 
County Route 685 0.66 mi. CR 533 in Bridgewater Twp. NJ 28 in Bridgewater Twp. Promenade Boulevard See also
U.S. Roads portal
New Jersey portal
Municipalities and communities of Somerset County, New Jersey Boroughs 
Townships Bedminster | Bernards | Branchburg | Bridgewater | Franklin | Green Brook | Hillsborough | Montgomery | Warren
CDPs Communities Basking Ridge | Flagtown | Franklin Park | Gladstone | Griggstown | Harlingen | Kingston | Lamington | Liberty Corner | Lyons | Martinsville | Middlebush | Neshanic | Neshanic Station | North Branch | Pleasant Plains | Pottersville | Six Mile Run | Skillman | South Branch | Weston | Zarephath
Categories:- County routes in New Jersey
- Lists of roads in the United States
- New Jersey-related lists
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