Sumner, Jefferson County, Wisconsin

According to the United States Census Bureau, the town has a total area of 31.3 square miles (81.0 km²), of which 16.3 square miles (42.2 km²) is land and 15.0 square miles (38.9 km²), or 47.97%, is water.

At the 2000 census there were 904 people, 370 households, and 259 families in the town. The population density was 55.5 people per square mile (21.4/km²). There were 555 housing units at an average density of 34.1 per square mile (13.2/km²). The racial makeup of the town was 98.89% White, 0.33% Native American, 0.22% Asian, 0.11% Pacific Islander, and 0.44% from two or more races. Hispanic or Latino of any race were 0.33%.[2]

Of the 370 households 25.4% had children under the age of 18 living with them, 60.0% were married couples living together, 4.6% had a female householder with no husband present, and 30.0% were non-families. 23.2% of households were one person and 13.5% were one person aged 65 or older. The average household size was 2.44 and the average family size was 2.85.

The age distribution was 19.9% under the age of 18, 7.0% from 18 to 24, 27.0% from 25 to 44, 30.0% from 45 to 64, and 16.2% 65 or older. The median age was 43 years. For every 100 females, there were 112.2 males. For every 100 females age 18 and over, there were 104.5 males.

The median household income was $51,250 and the median family income was $56,944. Males had a median income of $34,773 versus $25,000 for females. The per capita income for the town was $25,416. About 2.1% of families and 3.5% of the population were below the poverty line, including 4.1% of those under age 18 and 4.1% of those age 65 or over.

The Swedish-American ornithologist Thure Kumlien lived on a farm near Busseyville in the town.

Sumner borders Lake Koshkonong, one of the larger lakes in Wisconsin. Sumner is also known for having a large number of Indian mounds.

• Town of Sumner official website