State Route 91
Route information
Maintained by MaineDOT
Length	7.83 mi[1] (12.60 km)
Existed	1949–present
Major junctions
South end	US 1 in York
North end	SR 236 in South Berwick
Location
Country	United States
State	Maine
Counties	York
Highway system
Maine State Highway System Interstate US State Auto trails Lettered highways
← SR 90 → SR 92

State Route 91 (SR 91) is a short state highway in southwestern Maine. It runs for 7.83 miles (12.60 km), connecting the towns of South Berwick and York.

SR 91 begins at an intersection with U.S. Route 1 (US 1) in York. The highway proceeds out of town to the northwest towards South Berwick, just nicking the corner of Eliot along the way. The first three miles (4.8 km) of the route follow the York River towards South Berwick. SR 91 passes under Interstate 95 (the Maine Turnpike) without an interchange, then has its northern terminus at SR 236.

The entire route is in York County.

Location	mi	km	Destinations	Notes
York	0.00	0.00	US 1 to I-95 (Maine Turnpike) / US 1A north – York, Kittery	Southern terminus
South Berwick	7.83	12.60	SR 236 (Harold L. Dow Highway) to SR 4 – South Berwick, Eliot	Northern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi