State Route 9A (SR 9A) is a numbered state highway in Maine, which serves as an alternate to SR 9.

SR 9A begins at a split with SR 9 in Wells, curving to the northeast and immediately crossing Route 109.

SR 9A proceeds northeast, paralleling Interstate 95 (Maine Turnpike), as well as U.S. Route 1 (US 1) and SR 9 which lay to its east.

SR 9A turns to the east and enters the town of Kennebunk, passing under the Turnpike without an interchange.

SR 9A and 35 continue about 2 miles (3.2 km) southeast to Kennebunkport and an intersection with SR 9, at which both routes end in concurrency.