Mauston is a city in and the county seat of Juneau County, Wisconsin, United States. The population was 3,740 at the 2000 census.
According to the United States Census Bureau, the city has a total area of 4.1 square miles (10.6 km²), of which, 3.7 square miles (9.5 km²) of it is land and 0.4 square miles (1.1 km²) of it (10.73%) is water.
There were 1,585 households out of which 29.1% had children under the age of 18 living with them, 45.0% were married couples living together, 11.8% had a female householder with no husband present, and 39.2% were non-families. 33.5% of all households were made up of individuals and 18.7% had someone living alone who was 65 years of age or older. The average household size was 2.28 and the average family size was 2.89.
In the city the population was spread out with 24.2% under the age of 18, 8.6% from 18 to 24, 27.1% from 25 to 44, 19.2% from 45 to 64, and 20.9% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 88.1 males. For every 100 females age 18 and over, there were 81.4 males.
The median income for a household in the city was $32,341, and the median income for a family was $42,866. Males had a median income of $31,250 versus $21,589 for females. The per capita income for the city was $21,640. About 8.7% of families and 11.9% of the population were below the poverty line, including 18.4% of those under age 18 and 15.4% of those age 65 or over.