Jefferson Island, Montana
Jefferson Island is a small, unincorporated community in Madison County, Montana. Montana Highway 359 passes through it, and it sits about 1 mile south of Cardwell. The Jefferson River runs to the north of the area. A post office opened in 1909 as Lahood, was renamed Jefferson Island in 1912, and closed in 1954. The community's name comes from a river island in the Jefferson River.
This page was last edited on 2 February 2026, at 03:06 (CET).