
Wisconsin · FIPS 55131
Washington ZIP codes — Washington County, Wisconsin
Quick answer
Washington County is home to 137,320 residents with a median household income of $95,851 and a median home value of $316,200. 78.1% of households own their home and 5.3% of residents live below the poverty line. Looking for a Washington ZIP code? 11 ZIP code areas fall inside Washington County, Wisconsin, listed in full below.
- Population
- 137,320Washington County residents
- Median household income
- $95,851Past 12 months, inflation adjusted
- Median home value
- $316,200Owner-occupied units
- Median gross rent
- $1,126Rent plus utilities, monthly
- Median age
- 43.5 yrsAll residents
- Homeownership rate
- 78.1%Owner-occupied households
Washington County, WI in context
How this area compares with national benchmarks.
Washington County is a mid-size city in Wisconsin, with 137,320 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates. The median age here is 43.5 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 Washington County earn a median of $95,851 a year, 22% above the national figure of $78,538. This figure covers the household, not the worker: two people on ordinary wages at one address outrank a single professional in the same table. Poverty reaches 5.3% of residents here, less than half the 12.4% national rate.
The typical owner-occupied home in Washington County is valued at $316,200, 4.2% above the national figure, while median gross rent runs $1,126 a month, 19.9% below the national figure, or roughly $13,512 across a full year. A household on the local median income would put about 14.1% 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 3.3×, against roughly 3.9× nationally, so buying is easier here than in the average US market. 78.1% 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.
ZIP codes in Washington County
ZIP code tabulation areas whose land area falls mostly in Washington County.
How to read this page
What these estimates cover.
Figures are five-year rolling averages from the American Community Survey, not single-year counts, so they describe conditions across 2019-2023 ACS 5-year rather than a single date. Median home value covers owner-occupied units as valued by their owners, and median gross rent includes utilities the renter pays. Small counties carry wide margins of error; treat single-dollar differences between neighbouring counties as noise.
Source: US Census Bureau, ACS 2019-2023 5-year estimates · rates as published for 2019-2023 ACS 5-year
Cities and towns in Wisconsin
Largest Census places in Wisconsin by population.
- Milwaukee city 569,756
- Madison city 275,568
- Green Bay city 106,585
- Kenosha city 99,147
- Racine city 77,155
- Appleton city 74,873
- Waukesha city 70,779
- Eau Claire city 69,274
- Oshkosh city 66,247
- Janesville city 65,813
- West Allis city 59,588
- La Crosse city 51,791
Nearby counties
Other counties in Wisconsin.
Frequently asked questions
Common questions about this area.
- What is the population of Washington County?
- Washington County has 137,320 residents on Census ACS 2019-2023 ACS 5-year estimates.
- What is the median household income in Washington County?
- Median household income in Washington County is $95,851 a year, 22% above the national figure of $78,538.
- How much does it cost to rent or buy in Washington County?
- Median gross rent is $1,126 a month and the median home value is $316,200, so rent absorbs about 14.1% of median household income.
- Is Washington County affordable compared with the rest of the US?
- Homes cost about 3.3× the local median income here versus roughly 3.9× nationally, so Washington County is more affordable to buy in than the typical US market, and rent takes 14.1% of median income against the 30% cost-burden line.
- How current is this Washington County data?
- All figures come from the US Census Bureau American Community Survey 2019-2023 ACS 5-year five-year estimates. 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.