State Route 191 or SR-191 is a 13.942-mile (22.437 km) state highway that serves as a connection between Maplesville and Jemison in western Chilton County. SR-191 intersects SR-22 at its southern terminus and US-31 at its northern terminus.

State Route 191 begins at its intersection with SR-22 just east of Maplesville. The route progresses in a northerly direction through its intersection with County Road 36 where it turns in a northeasterly direction in route to its northern terminus at US-31 in Jemison.

The entire route is in Chilton County.