Eileen is a town in Bayfield County, Wisconsin, United States.

The town was organized in 1904, in large part due to the efforts of state senator A. Pearce Tomkins.

Highways 2 and 63, Wisconsin Highways 118 and 137, and County G. The town of Eileen is bordered to the east by the city of Ashland and also the town of Gingles in Ashland County.

The racial makeup of the town was 97.81% White, 0.47% Native American, 0.47% Asian, and 1.25% from two or more races.

18.5% of all households were made up of individuals, and 9.6% had someone living alone who was 65 years of age or older.