The average household size was 2.56 and the average family size was 3.07. In the city, the population was spread out, with 28.5% under the age of 18, 8.6% from 18 to 24, 33.7% from 25 to 44, 19.8% from 45 to 64, and 9.3% who were 65 years of age or older. The median age was 33 years. For every 100 females, there were 92.8 males. For every 100 females age 18 and over, there were 89.0 males. The median income for a household in the city was $51,345, and the median income for a family was $61,197. Males had a median income of $40,510 versus $28,786 for females. The per capita income for the city was $23,277. About 3.8% of families and 4.4% of the population were below the poverty line, including 6.1% of those under age 18 and 5.3% of those age 65 or over. Sun Prairie has a mayor–council form of government. The mayor is elected at large every odd-numbered year. Paul Esser was elected mayor on April 7, 2015, when he defeated challenger Bill Clausius. The city council consists of eight alderpersons, who along with the mayor, make up the Common Council. There are four aldermanic districts, with two alderpersons per district, each serving for two-year terms over alternating years. The council manages the city's budget and financial operations and determines the salaries of all officers and employees of the city. Sun Prairie has a full-time city administrator, who is responsible for the administration of the city government in accordance with the policies established by the Common Council. Other city officers consist of assistant administrator, City Clerk, treasurer, assessor, municipal judge Tom Hebl, police chief and fire chief. Representative Gary Hebl and Senator Mark F. Miller represent the city of Sun Prairie in the Wisconsin State Legislature. At the federal level, the city is represented by Ron Johnson (R) and Tammy Baldwin (D) in the U.S. Senate and Mark Pocan (D) in the House of Representatives. Sun Prairie has had two local Public-access television cable TV stations, KSUN-12 and KIDS-4, for over 30 years. KIDS-4's programming content, camera, sound, lighting, editing, writing, and direction are produced by 30 to 40 children selected each year.