Coulee City, Washington Demographics & Population 2026

A note before these figures: with a population of 439, Coulee City's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.

Population Overview

Coulee City is a small community located in Washington, within Grant County. The total population is 439. It ranks as the 490th most populous out of 628 Census-designated places in Washington.

Age Demographics

The median age in Coulee City is 61.9 years. This is 62% higher than the state median of 38.3 years. Only 8.0% of residents are under 18, indicating fewer families with children. 21.6% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The median household income in Coulee City is $61,250. This is 38% lower than the state median of $98,141. It is also 24% lower than the national median of $80,734. The poverty rate stands at 10.9%. This is 10% higher than the state poverty rate of 9.9%. The unemployment rate is 4.2%. This is 18% lower than the state rate of 5.1%. The median home value is $165,500. Housing costs are 71% lower than the state median of $564,600. With a home-value-to-income ratio of just 2.7x, Coulee City is one of the most affordable housing markets in the area. 73.4% of occupied housing units are owner-occupied. This homeownership rate is 15% higher than the state average of 63.8%.

Race & Ethnicity

Coulee City has a predominantly White (non-Hispanic) population, comprising 94.3% of all residents.

Education

8.3% of residents aged 25 and older hold a bachelor's degree or higher. This is among the lowest rates in the state, which may correlate with employment and income patterns. This is 79% lower than the state rate of 39.6%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 82.9%.

Data Sources & Methodology

All demographic data for Coulee City, Washington is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Washington state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 628 Census-designated places in Washington. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.