Lomira is a town in Dodge County, Wisconsin, United States.
The unincorporated communities of Knowles and Nasbro are located in the town.
According to the United States Census Bureau, the town has a total area of 34.4 square miles (89.0 km2), all of it land.
There were 430 housing units at an average density of 12.5 per square mile (4.8/km2).
15.6% of all households were made up of individuals, and 5.9% had someone living alone who was 65 years of age or older.