Grant County, Washington Demographics 2026

Population Overview

Grant County is located in Washington with a total population of 100,428. It is the 13th most populous county out of 39 in Washington.

Age Demographics

The median age in Grant County is 33.5 years. This is 12% lower than the state median of 38.2 years. With 28.7% of the population under 18, Grant County has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Grant County is $71,115. This is 25% lower than the state median of $94,952. Compared to the national median of $78,538, household income here is 9% lower. The poverty rate stands at 15.0%. This is 51% higher than the state poverty rate of 9.9%. The unemployment rate is 6.3%. This is 27% higher than the state rate of 5.0%. The median home value is $275,700. Housing costs are 47% lower than the state median of $519,800. The home-value-to-income ratio is 3.9x. 65.6% of occupied housing units are owner-occupied. This homeownership rate is 3% higher than the state average of 63.9%.

Race & Ethnicity

The largest racial or ethnic group in Grant County is White (non-Hispanic), making up 50.0% of the population. Hispanic or Latino residents account for 43.3%. The Black or African American population (1.2%) is well below the state average of 3.8%. The Hispanic or Latino population is significantly higher than the state average (43.3% vs 14.1%). The Asian population (0.9%) is well below the state average of 9.3%.

Education

18.2% 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 53% lower than the state rate of 38.8%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 81.4%.