The road has been posted as a US highway since 1930. From 1930 to 1934, it was US 122; in 1935, that designation was given instead to the Pottsville-Reading road in Pennsylvania (now PA 61) and this road was labeled US 202, for its status as a spur off US 2 at Bangor, Me. The southern terminus of US 202 is US 13 at New Castle.
However, in Bergen County, US 202 is not under state jurisdiction. Instead, it is maintained by the county; all but the northernmost 0.04 mile is designated County Road 91 (the remainder is part of CR 507).
A short 0.32-mile section of the road, between Yawpo and Franklin Avenues in Oakland, is state-maintained thanks to the project that upgraded NJ 208 to I-287 in 1993.
| Mile | |||
| NJDOT | CR 91 | Street Name | Feature |
| 70.54 | 0.00 | Entering Oakland Boro | |
| 70.54 | 0.00 | CR 91 BEGINS, Oakland Boro | |
 Northbound as Route 202 enters Oakland. You know it’s a county road because of the Welcome to Bergen County sign with the county executive’s name on it. | |||
| 71.31 | 0.77 | Ramapo Valley Rd | [Long Hill Rd, CR 93 / Post Rd] {signal} |
| 72.15 | 1.61 | Ramapo Valley Rd | Oak Ave {signal} |
| 72.37 | 1.83 | End Bergen Co. maintenance; begin NJDOT maintenance | |
| 72.40 | 1.86 | Ramapo Valley Rd | Susquehanna Railroad {at-grade crossing} |
| 72.42 | 1.88 | Ramapo Valley Rd | (West Oakland Ave, CR S-91) {signal} |
| 72.54 | 2.00 | Ramapo Valley Rd | I-287 {underpass} |
| 72.61 | 2.07 | Ramapo Valley Rd | Court House Pl / I-287 Ramp {signal} |
| 72.69 | 2.15 | End NJDOT maintenance; begin Bergen Co. maintenance | |
| 72.69 | 2.15 | Ramapo Valley Rd | [Franklin Ave, CR 84] {signal} |
| 73.78 | 3.24 | Ramapo Valley Rd | Unnamed stream {pipe} |
| 74.17 | 3.63 | Ramapo Valley Rd | Unnamed stream {pipe} |
| 74.53 | 3.99 | Ramapo Valley Rd | Unnamed stream {pipe} |
 Ramapo Valley Road curves at the Oakland-Mahwah line. | |||
| 74.57 | 4.03 | Entering Mahwah Twp | |
| 75.08 | 4.54 | Ramapo Valley Rd | Fox River {bridge} |
| 75.17 | 4.63 | Ramapo Valley Rd | Unnamed stream {pipe} |
| 76.71 | 6.17 | Ramapo Valley Rd | Fyke Brook {pipe} |
 Northbound approaching Darlington Avenue. The historic Darlington Schoolhouse is on the left. | |||
| 77.49 | 6.95 | Ramapo Valley Rd | [Darlington Ave, CR 98] |
| 77.52 | 6.98 | Ramapo Valley Rd | Darlington Brook {pipe} |
| 77.95 | 7.41 | Ramapo Valley Rd | [Magnolia Rd, Ramapo College {signal}] |
| 78.29 | 7.75 | Ramapo Valley Rd | Unnamed stream {pipe} |
 There is no interchange here between Route 202 and I-287; use NJ 17 instead. | |||
| 78.70 | 8.16 | Ramapo Valley Rd | I-287 {underpass} |
| 79.01 | 8.47 | Ramapo Valley Rd | [Ramapo Ave, CR 100] |
 The southbound lanes of NJ 17 use a 1934 bridge that also crosses the adjacent Ramapo River. The pavement on this stretch of highway looks almost as old. | |||
| 79.30 | 8.76 | Ramapo Valley Rd | NJ 17 {underpass} |
| 79.53 | 8.99 | Ramapo Valley Rd | Unnamed stream {pipe} |
| 79.78 | 9.24 | Ramapo Valley Rd | Unnamed stream {pipe} |
| 79.87 | 9.33 | Ramapo Valley Rd | [Island Rd, CR 85] |
 Approaching the Erie Railroad trestle at north end of Ramapo Valley Road. | |||
| 80.26 | 9.72 | Ramapo Valley Rd | Erie Railroad {underpass} |
 Looking under the bridge at Franklin Turnpike, CR 507. | |||
| 80.28 | 9.73 | Ramapo Valley Rd | Franklin Tpk, CR 507 {signal} |
| 80.28 | 9.73 | CR 91 ENDS, Mahwah Twp | |
 A southbound look at the trestle, taken from across Franklin Turnpike. | |||
| 80.28 | US 202 turns left onto Franklin Tpk | ||
 The intersection, as seen from Franklin Turnpike northbound. | |||
| 80.28 | Next 0.04 mile co-signed with CR 507 | ||
 Southbound on US 202 at the state line. | |||
| 80.31 | Entering Suffern Village, Rockland Co., N.Y. | ||