Grand Coulee, Washington Demographics & Population 2026

A note before these figures: with a population of 913, Grand Coulee'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

Grand Coulee is a small community located in Washington, within Grant County. The total population is 913. It ranks as the 401st most populous out of 628 Census-designated places in Washington.

Age Demographics

The median age in Grand Coulee is 47.2 years. This is 23% higher than the state median of 38.3 years.

Economy, Income & Housing

The median household income in Grand Coulee is $64,250. This is 35% lower than the state median of $98,141. It is also 20% lower than the national median of $80,734. The poverty rate stands at 28.3%. This is 186% higher than the state poverty rate of 9.9%. With more than one in five residents living below the poverty line, economic hardship is a significant challenge for the community. The unemployment rate is 6.0%. This is 19% higher than the state rate of 5.1%. The median home value is $222,000. Housing costs are 61% lower than the state median of $564,600. The home-value-to-income ratio is 3.5x. 68.7% of occupied housing units are owner-occupied. This homeownership rate is 8% higher than the state average of 63.8%.

Race & Ethnicity

The largest racial or ethnic group in Grand Coulee is White (non-Hispanic), making up 69.3% of the population. Hispanic or Latino residents account for 14.9%. The Black or African American population (0.8%) is well below the state average of 3.9%. The Asian population (0.3%) is well below the state average of 9.7%.

Education

15.4% of residents aged 25 and older hold a bachelor's degree or higher. This is 61% 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 88.3%.

Data Sources & Methodology

All demographic data for Grand Coulee, 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.