| State: | OK |
| Type: | SH |
| Route: | 142 |
| Map Custom: | yes |
| Maint: | ODOT |
| Length Mi: | 4.31 |
| Length Round: | 1 |
| Direction A: | West |
| Direction B: | East |
| Terminus A: | in Ardmore |
| Junction: | in Ardmore |
| Terminus B: | in Ardmore |
| Previous Type: | SH |
| Previous Route: | 141 |
| Next Type: | SH |
| Next Route: | 144 |
State Highway 142, abbreviated SH-142, is a 4.31miles highway in southern Oklahoma. It serves as a short truck route and bypass around the northern and eastern sections of Ardmore.
SH-142 in Ardmore is locally designated as Veterans Boulevard. The highway's western terminus is at I-35 (milemarker 33) in Ardmore. Beginning as a divided highway, it intersects US-77 (locally designated as Commerce) approximately 1 mile (1.6 kilometers) to the east. From there, SH-142 progresses as a two-lane highway approximately 2 miles (3.2 kilometers), passes by Ardmore Middle and High Schools, makes a fairly sharp right turn to the south (near the Valero refinery), and terminates 1 mile (1.6 kilometers) to the south at an intersection with State Highway 199. The roadway (but not the SH-142 designation) continues south as P Street Northeast just to the east of greater Ardmore.
SH-142 was originally designated as a state highway in 1958 between US-77 on Ardmore's north side and the former US-70 on the east side of the city which is the current SH-199. In 1969 when I-35 was completed along the west side of Ardmore, SH-142 was extended a mile further west from US-77 to an interchange with the interstate route.