ZIP code 99403

ZIP 99403 is a mid-size town in Asotin County, Washington, with 20,483 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #172 of 605 ranked by population — larger than 71% of them. The median age here is 45.5 years against 39.1 nationally, a markedly older profile that usually tracks retirees staying put and younger households leaving for work. 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 ZIP 99403 earn a median of $67,424 a year, 14.2% below the national figure of $78,538. The median is the midpoint household, not an average, so a handful of very high earners cannot drag it upward the way they distort a mean. Poverty reaches 15.8% of residents here, above the 12.4% national rate.

The typical owner-occupied home in ZIP 99403 is valued at $283,800, 6.5% below the national figure, while median gross rent runs $994 a month, 29.3% below the national figure, or roughly $11,928 across a full year. A household on the local median income would put about 17.7% 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 4.2×, against roughly 3.9× nationally, so buying is harder here than in the average US market. 72% of occupied homes are owner-occupied versus 65% nationally, so the market leans toward owners. Rent is reported gross — contract rent plus tenant-paid utilities — which is why it runs above the advertised price on a listing for the same unit.

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 99403 is tabulated inside Asotin County, Washington, one of 3 ZIP areas the Census publishes for that county and 605 across Washington. This is a mid-sized ZIP that covers a large share of its county's addresses. County assignment on this page follows the largest share of the ZIP's land area, which matters where a delivery route crosses a county line: mail addressed to 99403 can be handled by a post office in a neighbouring county even though the tabulation area is filed here.

Against its own county, 99403 reports a median household income of $67,424, close to the $67,424 county median, and 17% below the $80,861 typical WA ZIP. Owner-occupied homes are valued at a median of $283,800, 4% below the county figure and 33% below the statewide ZIP median. Rent is reported gross — the contract amount plus tenant-paid utilities — at $994 a month, which is why it reads higher than the advertised rent on a listing for the same unit.

Washington charges 6.5% statewide, and local governments overlapping 99403 may add county, city or special-district levies on top. We publish the state floor for this ZIP rather than guessing a combined figure, because ZIP boundaries and taxing-district boundaries were drawn for different purposes and do not line up.

Everything above comes from the Census Bureau American Community Survey 2019-2023 ACS 5-year estimates for this ZIP Code Tabulation Area, with sales tax rates traced to the state revenue agency. Five-year estimates pool sixty months of responses, so they are stable enough to compare 99403 with its neighbours but always trail the current year, and any value the Census suppressed for sample size is shown as unpublished rather than filled in with a model.