State Route 177 is a 5.160-mile (8.304 km) long route in Jackson in the southwestern part of the state. Bothis its southern and northern termini are at separate intersections with US-43 in Jackson.

Prior to 1970, US-43 passed through Jackson. With the completion of a by-pass to the west of the city, US-43 was moved to the new roadway, and State Route 177 was designated along the former U.S. Highway. State Route 177 also serves as the southern terminus of State Route 69, one of the longest state routes in Alabama.

The entire route is in Jackson, Clarke County.