.
| Route | Length[1] | South/West end | North/East end | Road Name(s) |
|---|
| 'County Route 601' | 0.63 mi. | CR 602 in Blairstown | CR 521 in Blairstown | High St. |
| 'County Route 602' | 5.99 mi. | NJ 94 in Blairstown | Stream in Hardwick Twp. | Millbrook Rd. |
| 'County Route 604' | 5.46 mi. | US 46 in Hackettstown | Sussex Co. line in Allamuchy Twp. (continues as Sussex CR 604) | Willow Grove St., Waterloo Rd. |
| 'County Route 605' | 4.34 mi. | CR 616 in Knowlton Twp. | NJ 94 in Knowlton Twp. | Valley St., Delaware Rd., Warrington Rd. |
| 'County Route 607' | 0.75 mi. | CR 521 in Blairstown | CR 616 in Blairstown | Edge Hill Rd. |
| 'County Route 608' | 4.99 mi. | CR 521 in Hope Twp. | NJ 94 in Frelinghuysen Twp. | Hope-Marlboro Rd., Silver Lake Rd. |
| 'County Route 609' | 5.50 mi. | US 46 in Knowlton Twp. | CR 519/521 in Hope Twp. | Ramseyburg Rd., Delaware Rd., High St. |
| 'County Route 610' | 2.38 mi. | CR 519 in Hope Twp. | CR 609 in Hope Twp. | Swayze Mill Rd. |
| 'County Route 611' | 4.77 mi. | US 46 in Independence Twp. | CR 519 in Hope Twp. | Hope Rd., Hope-Great Meadows Rd. |
| 'County Route 611M' | 0.26 mi. | CR 519 in Hope Twp. | CR 521 in Hope Twp. | Millbrook Rd., Walnut St. |
| 'County Route 612' | 5.12 mi. | CR 667 in Allamuchy Twp. | CR 661 in Frelinghuysen Twp. | Johsonburg Rd., Allamuchy Rd. |
| 'County Route 613' | 6.87 mi. | US 46 in Independence Twp. | CR 612 in Allamuchy Twp. | Alphano Rd. |
| 'County Route 614' | 3.85 mi. | US 46 in Independence Twp. | US 46 in Independence Twp. | Water St., Petersburg Rd. |
| 'County Route 615' | 2.07 mi. | CR 613 in Allamuchy Twp. | CR 612 in Allamuchy Twp. | Long Bridge Rd. |
| 'County Route 616' | 9.62 mi. | US 46 in Knowlton Twp. | Blairstown in NJ 94 | Knowlton Rd., Mount Hermon Rd., Cedar Lake Rd. |
| 'County Route 617' | 2.12 mi. | US 46 in White Twp. | Lakeside Dr. South in Liberty Twp. | Green Pond Rd., Mountain Lake Rd. |
| 'County Route 618' | 2.08 mi. | US 46 in White Twp. | CR 519 in White Twp. | Sarepta Rd. |
| 'County Route 619' | 0.73 mi. | US 46 in White Twp. | US 46 in White Twp. | Titman Rd. |
| 'County Route 620' | 3.37 mi. | CR 519 in White Twp. | US 46 in White Twp. | Greenwich St., Water St. |
| 'County Route 620 Spur' | 0.34 mi. | Riverton-Belvidere Bridge (PA line) in Belvidere | CR 620 in Belvidere | Water St. |
| 'County Route 621' | 9.14 mi. | Memorial Parkway in Phillipsburg | CR 519 in Harmony Twp. | North Main St., River Rd., Brainards Rd. |
| 'County Route 621 Spur' | 0.18 mi. | CR 621 in Harmony Twp. | Railroad Ave. in Harmony Twp. | Broad St. |
| 'County Route 622' | 3.03 mi. | CR 519 in Harmony Twp. | CR 519 in Harmony Twp. | Hutchinson Station Rd., Hutchinson River Rd., Roxbury Station Rd. |
| 'County Route 623' | 6.53 mi. | NJ 57 in Washington Twp. | Belvidere line in White Twp. | Brass Castle Rd. |
| 'County Route 624' | 2.83 mi. | CR 623 in White Twp. | NJ 31 in Oxford Twp. | Haven Oxford Rd., Belvidere Ave. |
| 'County Route 625' | 7.35 mi. | CR 623 in Washington Twp. | US 46 in White Twp. | Jonestown Rd., Academy St., Oxford Rd., Pequest-Furnace Rd. |
| 'County Route 626' | 3.15 mi. | CR 519 in White Twp. | CR 623 in White Twp. | Lommasons Glen Rd., Summerfield Rd. |
| 'County Route 627' | 4.11 mi. | Hunterdon Co. line in Pohatcong Twp. (continues as Hunterdon CR 627) | CR 519 in Pohatcong Twp. | Riegelsville-Warren Glen Rd. |
| 'County Route 628' | 6.48 mi. | CR 623 in Washington Twp. | CR 629 in Mansfield Twp. | Kinnaman Rd., Jackson Valley Rd., Karrville Rd. |
| 'County Route 629' | 6.66 mi. | NJ 57 in Mansfield Twp. | Hackettstown line in Mansfield Twp. | Port Murray Rd., Main St., Rockport Rd. |
| 'County Route 630' | 1.50 mi. | NJ 31 in Washington Twp. | NJ 57 in Washington Twp. | Washburn Ave. |
| 'County Route 631' | 0.33 mi. | CR 625 in Oxford Twp. | CR 624 in Oxford Twp. | Washington Ave. |
| 'County Route 632' | 11.89 mi. | NJ 173 in Greenwich Twp. | NJ 57 in Mansfield Twp. | Bloomsbury Rd., Andersen Rd. |
| 'County Route 633' | 1.00 mi. | Franklin Twp. | NJ 57 in Franklin Twp. | Edison Rd. |
| 'County Route 634' | 0.66 mi. | CR 632 in Washington Twp. | NJ 31 in Washington Twp. | Bryants Rd. |
| 'County Route 635' | 2.32 mi. | Carpentersville Rd. in Pohatcong Twp. | CR 519 in Pohatcong Twp. | Snyders Rd. |
| 'County Route 636' | 1.37 mi. | CR 519 in Pohatcong Twp. | CR 639 in Pohatcong Twp. | Municipal Dr. |
| 'County Route 637' | 5.07 mi. | CR 639 in Greenwich Twp. | CR 519 in Lopatcong Twp. | Maple Dr., South Main St., North Main St., Liberty Rd. |
| 'County Route 638' | 2.44 mi. | US 22 in Greenwich Twp. | Richline Rd. in Greenwich Twp. | Greenwich St., Washington St. |
| 'County Route 639' | 2.86 mi. | CR 519 in Pohatcong Twp. | NJ 173 in Greenwich Twp. | Warren Glen-Bloomsburg Rd., Warren Glen Rd. |
| 'County Route 640' | 1.04 mi. | NJ 31 in Washington Twp. | Cemetery Rd. in Washington Twp. | South Lincoln Ave. |
| 'County Route 641' | 0.63 mi. | CR 519 in Alpha | CR 642 in Alpha | Springtown Rd. |
| 'County Route 642' | 0.86 mi. | Creek Rd. in Pohatcong Twp. | CR 519 in Alpha | High St. |
| 'County Route 643' | 3.87 mi. | Hunterdon Co. line in Franklin Twp. | NJ 57 in Franklin Twp. | Main St., Asbury-Broadway Rd. |
| 'County Route 644' | 0.47 mi. | NJ 173 in Greenwich Twp. | NJ 173 in Greenwich Twp. | Greenwich Church Rd. |
| 'County Route 645' | 1.94 mi. | Hunterdon Co. line in Washington Twp. | CR 630 in Washington Twp. | Changewater Rd. |
| 'County Route 646' | 3.88 mi. | US 22 in Phillipsburg | CR 519 in Harmony Twp. | Lincoln St., Belvidere Rd. |
| 'County Route 647' | 8.06 mi. | CR 519 in Harmony Twp. | CR 623 in Washington Twp. | Harmony Rd., Brass Castle Rd., Montana Rd. |
| 'County Route 648' | 1.90 mi. | NJ 57 in Washington Twp. | CR 623 in Washington Twp. | Little Philadelphia Rd. |
| 'County Route 649' | 1.62 mi. | CR 628 in Washington Twp. | CR 628 in Washington Twp. | Plane Hill Rd., Mine Hill Rd. |
| 'County Route 650' | 1.57 mi. | CR 628 in Mansfield Twp. | NJ 31 in Mansfield Twp. | Tunnel Hill Rd. |
| 'County Route 651' | 1.28 mi. | CR 632 in Washington Twp. | NJ 57 in Washington Twp. | Port Colden-Changewater Rd. |
| 'County Route 652' | 2.43 mi. | NJ 57 in Mansfield Twp. | CR 629 in Mansfield Twp. | Water Rd., Thomas Rd. |
| 'County Route 653' | 0.37 mi. | CR 517 in Allamuchy Twp. | Allamuchy Twp. | Old Hacketstown Rd. |
| 'County Route 654' | 0.31 mi. | CR 517 in Hackettstown | CR 517 in Independence Twp. | Old Allamuchy Rd. |
| 'County Route 655' | 6.22 mi. | CR 609 in Hope Twp. | NJ 94 in Blairstown | Mt. Herman Rd. |
| 'County Route 656' | 0.58 mi. | US 46 in Independence Twp. | US 46 in Independence Twp. | Tannery Rd. |
| 'County Route 657' | 0.63 mi. | An I-80 ramp in Knowlton Twp. | Hainesburg River Rd. in Knowlton Twp. | Simpson Rd. |
| 'County Route 658' | 2.72 mi. | CR 605 in Knowlton Twp. | Polkville-Kill Rd. in Blairstown | Vail Rd. |
| 'County Route 659' | 3.15 mi. | CR 602 in Hardwick Twp. | NJ 94 in Frelinghuysen Twp. | Spring Valley Rd. |
| 'County Route 660' | 0.31 mi. | NJ 94 in Blairstown | CR 602 in Blairstown | Academy St. |
| 'County Route 661' | 2.74 mi. | CR 519 in Frelinghuysen Twp. | NJ 94 in Frelinghuysen Twp. | Dark Moon Rd., Ramsey Rd. |
| 'County Route 665' | 0.87 mi. | CR 517 in Independence Twp. | CR 604 in Hackettstown | Bilby Rd. |
| 'County Route 667' | 0.36 mi. | CR 517 in Allamuchy Twp. | CR 517 in Allamuchy Twp. | Old Hacketstown Rd. |
| 'County Route 668' | 1.07 mi. | CR 612 in Allamuchy Twp. | Sussex Co. line in Allamuchy Twp. | Cemetery Rd. |
| 'County Route 6xx' | 1.24 mi. | CR 612 in Allamuchy Twp. | Sussex Co. line in Allamuchy Twp. | Ervey Rd. |
| 'County Route 671' | 0.62 mi. | NJ 94 in Blairstown | NJ 94 in Blairstown | Eisenhower Rd. |
| 'County Route 672' | 0.33 mi. | NJ 94 in Blairstown | NJ 94 in Blairstown | Democracy Rd. |
| 'County Route 673' | 0.56 mi. | NJ 94 in Blairstown | NJ 94 in Blairstown | Eisenhower Rd. |
| 'County Route 674' | 0.85 mi. | NJ 94 in Blairstown | NJ 94 in Blairstown | Buchannan Rd. |
| 'County Route 675' | 0.24 mi. | NJ 94 in Blairstown | NJ 94 in Blairstown | Adams Rd. |
| 'County Route 676' | 0.20 mi. | Church St. in Knowlton Twp. | Washington St. in Knowlton Twp. | Columbia St., Decatur St., Green St. |
| 'County Route 677' | 0.25 mi. | Raymond St. in Phillipsburg | US 22 in Phillipsburg | Morris Ave. |
| 'County Route 678' | 0.92 mi. | Pursel St. in Phillipsburg (continues as NJ 122) | Sitgreaves St./S. Main St. in Phillipsburg | South Main St. |
| 'County Route 679' | 2.94 mi. | Lakeside Dr. North in Liberty Twp. | CR 611 in Liberty Twp. | Mountain Lake Rd. |
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