Ithaca is a town in Richland County, Wisconsin, United States.

The unincorporated communities of Aubrey, Bear Valley, Ithaca, Keyesville, and Neptune are located in the town.

According to the United States Census Bureau, the town has a total area of 36.0 square miles (93.3 km2), all of it land.

The racial makeup of the town was 98.61% White, 0.15% African American, 0.62% Asian, and 0.62% from two or more races.

The town also holds an annual fair on Saturday in late September/early October featuring a dairy cow show, judging other animals including sheep and pigs, crafts show and the highlight is the parade on state Highway 58, the Homecoming game for the Ithaca Bulldogs and Homecoming dance that Saturday night.