Mount Ida is a town in Grant County, Wisconsin, United States.

The unincorporated communities of Mount Ida and Werley are located in the town.

According to the United States Census Bureau, the town has a total area of 36.3 square miles (94.0 km2), all of it is land.

There were 204 housing units at an average density of 5.6 per square mile (2.2/km2).

The racial makeup of the town was 99.62% White, 0.19% Asian, and 0.19% from two or more races.