Marietta is a town in Crawford County, Wisconsin, United States.

The unincorporated community of Easter Rock is located in the town.

The unincorporated community of Boydtown is located partially in the town.

There were 248 housing units at an average density of 5.3 per square mile (2.0/km2).

23.9% of all households were made up of individuals, and 10.2% had someone living alone who was 65 years of age or older.