State Route 203 or SR-203 is a 3.080-mile (4.957 km) long route that serves as a bypass around the northern and western portions of the town of Elba in Coffee County.

The southern terminus of SR-203 is located at its intersection with State Route 189 south of central Elba. From this point, the route travels in a northwesterly direction in route to U.S. Highway 84. From this point it begins its gradual loop in a northeasterly direction before reaching its northern terminus at its junction with State Route 125 northeast of central Elba.

The entire route is in Coffee County.