State route 157 (SR-157) is a state highway in Carbon County in the U.S. state of Utah. Spanning 5 miles (8.0 km), it connects Helper and Spring Glen with Kenilworth to the northeast.

State Route 157 begins on SR-244 at the intersection of Poplar Street and Main Street in the town of Helper. From there the route travels south 1.2 miles (1.9 km) along Main Street toward Spring Glen, parallel to US-6/US-191, before turning east onto Kenilworth Road. The route then travels ENE along Kenilworth road about 3.3 miles (5.3 km) to Kenilworth, turning north onto Main Street for about 0.2 miles (0.32 km), which then turns back to the west for the last 0.2 miles (0.32 km), ending at Main Street and 1st Avenue.

State Route 157 was established in 1933 as connecting what was then SR-8 (now US-6) between Helper and Spring Glen with Kenilworth. In 1959, the route's west end was extended north to SR-244 in Helper, reflecting its current alignment (south from Helper to Kenilworth road, thence northeast to Kenilworth).

The entire route is in Carbon County.