Sun Prairie, WI population, income and ZIP codes

Sun Prairie city is a small city in Wisconsin, with 36,455 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #23 of 807 ranked by population — larger than 97% of them. The median age here is 36.9 years against 39.1 nationally, a slightly younger profile than the country as a whole. Places under 65,000 residents only appear in the five-year release, never the one-year file, so these values pool sixty months of responses and lag the current year by design.

Households in Sun Prairie city earn a median of $90,521 a year, 15.3% above the national figure of $78,538 and 23% above the $73,880 median for the 395 Wisconsin cities we cover. Median household income counts every pre-tax dollar arriving at an address — wages, self-employment, Social Security, pensions, interest and public assistance — for everyone living there, so multi-earner households pull the figure up even where individual pay is modest. Poverty reaches 6.1% of residents here, less than half the 12.4% national rate.

The typical owner-occupied home in Sun Prairie city is valued at $339,800, 12% above the national figure and 60% above the $211,900 peer median, while median gross rent runs $1,374 a month, 2.3% below the national figure, or roughly $16,488 across a full year. A household on the local median income would put about 18.2% of gross pay toward that rent against the federal 30% cost-burden threshold, so renting here is cheap relative to what people here earn. The home-price-to-income ratio works out to 3.8×, against roughly 3.9× nationally, so buying is easier here than in the average US market. 61.8% of occupied homes are owner-occupied versus 65% nationally, so the market leans more heavily on renters. The rent line includes utilities paid by the tenant, a definition worth remembering when comparing it against a landlord's quoted rate.

No figure on this page is estimated by us; each one comes straight from the published ACS tables for this area. Small-area estimates still carry wider margins of error than state or national figures, so check the linked ACS tables before relying on them for lending, appraisal or legal work.