Lake Mills is a city in Jefferson County, Wisconsin, United States.

[4] The city is located partially within the Town of Lake Mills.

[7][8] (Tyranena is supposedly an indigenous name meaning "sparkling waters".

[11] As of the census[3] of 2010, there were 5,708 people, 2,319 households, and 1,503 families living in the city.

There were 2,776 housing units at an average density of 683.7 per square mile (264.0/km2).

28.2% of all households were made up of individuals, and 11.6% had someone living alone who was 65 years of age or older.

There were 2,065 housing units at an average density of 603.6 per square mile (233.1/km2).

26.8% of all households were made up of individuals, and 13.0% had someone living alone who was 65 years of age or older.