City in Grant County, Washington · 1 sq mi · 3,979 people per sq mi
3,984 people live in Mattawa. The typical household earns $38,388, and the median resident is 21.7 years old.
2026 projection
From 3,335 in 2020
Poverty rate 33.27%
Men 20.8 · Women 22.4
1960–2026
3,984
2026 projection
19.5% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
1960–2026
3,984
2026 projection
19.5% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 3,984 | +110 | 2.84% |
|---|---|---|---|
| 2025 | 3,874 | +79 | 2.08% |
| 2024 | 3,795 | +23 | 0.61% |
| 2023 | 3,772 | +77 | 2.08% |
| 2022 | 3,695 | +198 | 5.66% |
| 2021 | 3,497 | +162 | 4.86% |
| 2020 | 3,335 | -103 | 3.00% |
| 2019 | 3,438 | -136 | 3.81% |
| 2018 | 3,574 | -150 | 4.03% |
| 2017 | 3,724 | -137 | 3.55% |
Showing 10 of 22 years.
The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.
Mattawa is growing faster than Grant County, Washington, and the U.S.
Change from July 1, 2020 to July 1, 2025 population estimates—not annualized growth or site projections.
Source: U.S. Census Bureau. U.S. totals are summed from the 50 states and D.C.; unavailable comparisons are omitted.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 36 people).
Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002
Half of households earn more, half earn less
Typical yearly pay for a worker 25 or older.
About 1 in 3 residents
32% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 32% | 30% | 33% |
| Never married | 59% | 63% | 56% |
| Divorced | 4% | 5% | 3% |
| Widowed | 1% | 0% | 2% |
| Separated | 5% | 2% | 6% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
14 sources