Mechanic Falls is a town in Androscoggin County, Maine, United States. The population was 3,107 at the 2020 census. It is included in both the Lewiston-Auburn, Maine metropolitan statistical area and the Lewiston-Auburn, Maine metropolitan New England city and town area.

State Route 26 (abbreviated SR 26) is part of Maine's system of numbered state highways. It is a major interregional route running for 95.90 miles (154.34 km) from downtown Portland northwest to the New Hampshire border near Upton, where it connects to New Hampshire Route 26. SR 26 runs in Cumberland, Androscoggin and Oxford Counties.