Williamson ZIP codes — Williamson County, Tennessee

Williamson County is a mid-size city in Tennessee, with 254,609 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates. The median age here is 40.3 years against 39.1 nationally, a slightly older profile than the country as a whole. At this size the Census also publishes one-year estimates; the five-year values used here are steadier and let you compare against smaller neighbours on the same basis.

Households in Williamson County earn a median of $131,202 a year, 67.1% above the national figure of $78,538. 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 4.5% of residents here, less than half the 12.4% national rate.

The typical owner-occupied home in Williamson County is valued at $673,700, 122.1% above the national figure, while median gross rent runs $1,895 a month, 34.8% above the national figure, or roughly $22,740 across a full year. A household on the local median income would put about 17.3% 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 5.1×, against roughly 3.9× nationally, so buying is harder here than in the average US market. 79.8% of occupied homes are owner-occupied versus 65% nationally, so the market leans toward owners. Gross rent folds in the utilities a tenant pays separately, so it is closer to the real monthly outlay than a headline rent figure.

Every value on this page is published directly by the Census for this area — nothing is modelled or interpolated. 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.