City · Washington
Mattawa, Washington
Mattawa, city, in Grant County, Washington. Mattawa had 3,874 residents on July 1, 2025 by the Census Bureau's estimate, up 15.7% since 2020; the 2020 Census counted 3,335 and the ACS 2020-2024 5-year estimates put it at 3,616 (±19). GEOID 5344165.
Residents, July 2025 estimate
3,874
Census Bureau estimate (no margin published)
2020 Census count: 3,335 · ACS 2020-2024: 3,616 ±19
Median household income
$38,388
±$19,884 (90% margin)
Washington: $98,141
Median home value
not published
Washington: $564,600
Median gross rent
$1,128
±$129 (90% margin)
Washington: $1,760
Where is Mattawa and what county is it in?
Mattawa is a city in Grant County, Washington. It covers 1.0 square miles of land, 3,332 residents per square mile in 2020.
Mattawa is in the Moses Lake, WA micropolitan statistical area (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Mattawa, and is it growing?
The Census Bureau estimates that 3,874 people lived in Mattawa on July 1, 2025, up 15.7% since 2020, faster than Washington (+3.8%). The 2020 Census counted 3,335 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 3,616 (±19).
| Measure | Mattawa | Grant County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 3,616 ±19 | 101,799 | −1,099 |
| Households | 935 ±122 | 35,398 | no clear change |
| Average household size | 3.84 ±0.49 | 2.79 | −0.96 |
| Housing units | 1,054 ±128 | 40,214 | no clear change |
Mattawa's population since 2000
From 2,609 in 2000 to 3,874 in 2025: up 48.5%. The 2000, 2010 and 2020 figures are census counts, each for Mattawa as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Mattawa?
The median resident of Mattawa is 21.7 years old. The largest group is Hispanic or Latino residents (of any race) at 99.8%, then non-Hispanic white residents at 0.1%. 51.2% of residents were born outside the United States.
| Measure | Mattawa | Grant County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 21.7 ±2.9 | 33.7 | no clear change |
| Under 18 years | 36.9% ±5.8 pts | 28.3% | – |
| 65 years and over | 3.2% ±2.6 pts | 14.6% | – |
| Male | 47.0% ±5.1 pts | 51.2% | – |
| Hispanic or Latino (any race) | 99.8% ±0.3 pts | 43.9% | no clear change |
| White alone, not Hispanic | 0.1% ±0.3 pts | 49.2% | – |
| Black or African American alone, not Hispanic | 0.0% ±1.1 pts | 1.2% | – |
| Asian alone, not Hispanic | 0.1% ±0.2 pts | 0.8% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±1.1 pts | 0.6% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±1.1 pts | 0.0% | – |
| Two or more races, not Hispanic | 0.0% ±1.1 pts | 4.1% | – |
| Some other race alone, not Hispanic | 0.0% ±1.1 pts | 0.2% | – |
| Born outside the United States | 51.2% ±6.2 pts | 16.1% | no clear change |
| Speak a language other than English at home (age 5+) | 95.9% ±3.6 pts | 35.6% | – |
| Civilian veterans (age 18+) | 0.5% ±0.8 pts | 6.5% | – |
| With a disability | 10.5% ±4.5 pts | 14.5% | – |
| No health insurance coverage | 38.6% ±7.4 pts | 13.6% | no clear change |
| High school graduate or higher (age 25+) | 29.4% ±9.0 pts | 81.4% | – |
| Bachelor's degree or higher (age 25+) | 0.2% ±0.7 pts | 18.4% | – |
| Graduate or professional degree (age 25+) | 0.0% ±2.6 pts | 5.6% | – |
| Lived in the same house a year earlier | 96.9% ±3.5 pts | 86.6% | – |
| Moved from another state in the past year | 0.4% ±0.7 pts | 1.2% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Mattawa earn?
Half of Mattawa's 935 households earn less than $38,388 a year (±$19,884), against $73,267 in Grant County and $98,141 in Washington. In 2015-2019 the median was $64,034 in 2024 dollars, so it fell by $25,646 after inflation. 33.3% of residents live below the poverty line.
| Measure | Mattawa | Grant County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $38,388 ±$19,884 | $73,267 | −$25,646 |
| Mean household income | $51,414 ±$7,461 | $92,003 | – |
| Per capita income | $14,167 ±$2,225 | $33,242 | no clear change |
| People below the poverty line | 33.3% ±8.9 pts | 15.8% | +19.7 pts |
| Children under 18 below the poverty line | 38.8% ±13.1 pts | 18.7% | +20.5 pts |
| Households receiving SNAP | 28.2% ±10.3 pts | 16.5% | – |
| Households with a computer | 91.0% ±9.1 pts | 94.9% | – |
| Households with a broadband subscription | 91.1% ±9.5 pts | 90.8% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Mattawa?
Owners occupy 25.0% of Mattawa's occupied homes and renters 75.0%. The median renter pays $1,128 a month including utilities, and 47.9% of renters pay 35% or more of their income on rent.
| Measure | Mattawa | Grant County | Change since 2015-2019 |
|---|---|---|---|
| Median gross rent | $1,128 ±$129 | $1,116 | no clear change |
| Renters paying 35% or more of income on rent | 47.9% ±14.4 pts | 34.6% | +22.5 pts |
| Median monthly owner costs, with a mortgage | $1,198 ±$287 | $1,670 | – |
| Owner-occupied homes | 25.0% ±9.7 pts | 66.3% | no clear change |
| Renter-occupied homes | 75.0% ±9.7 pts | 33.7% | – |
| Housing units | 1,054 ±128 | 40,214 | no clear change |
| Homeowner vacancy rate | 0.0% ±15.7 pts | 1.1% | – |
| Rental vacancy rate | 0.0% ±5.4 pts | 3.2% | – |
| Single-family detached homes | 19.2% ±8.9 pts | 58.5% | – |
| Mobile homes | 56.7% ±11.0 pts | 23.5% | – |
| Built 2020 or later | 0.0% ±3.7 pts | 2.1% | – |
| Built 2010 to 2019 | 10.2% ±5.2 pts | 13.3% | – |
| Built 1939 or earlier | 0.0% ±3.7 pts | 4.4% | – |
| Households with no vehicle | 2.5% ±3.7 pts | 5.1% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Mattawa building?
Builders took permits for 11 new housing units in Mattawa in 2025 (9 in single-family houses), 2.8 per 1,000 residents against 4.4 across Washington.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Mattawa work and get to work?
60.3% of Mattawa's workers drive alone. The average trip to work takes 25.7 minutes.
| Measure | Mattawa | Grant County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 64.2% ±6.9 pts | 62.3% | – |
| Unemployment rate | 11.6% ±8.1 pts | 6.5% | – |
| Drove alone to work | 60.3% ±9.0 pts | 73.2% | – |
| Carpooled | 27.3% ±10.0 pts | 12.4% | – |
| Public transportation | 0.0% ±3.1 pts | 1.6% | – |
| Walked | 3.7% ±3.8 pts | 1.9% | – |
| Worked from home | 8.7% ±7.1 pts | 9.7% | – |
| Mean travel time to work | 25.7 min ±3.4 | 20.2 min | +5.1 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Mattawa?
1 census tract lies mostly in Mattawa (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 114.03Grant County | 4,468 | $47,500 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Mattawa) · Census block assignment files
How does Mattawa compare with other places in Washington?
By the Census Bureau's July 2025 estimates, Mattawa is the 5,583rd-most populous of the 19,476 U.S. incorporated places that have one and the 133rd-most populous of 281 in Washington.
Mattawa ranks 386th of 387 places in Washington with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 133rd | 281 |
| Growth 2020-2025 (PEP) | 22nd | 203 |
| Residents per square mile | 68th | 394 |
| Median household income | 386th | 387 |
| Per capita income | 393rd | 393 |
| Median gross rent | 280th | 351 |
| Poverty rate | 2nd | 281 |
| Median age | 393rd | 394 |
| Owner-occupied share | 388th | 388 |
| Travel time to work | 221st | 394 |
Mattawa's figures with every place in Washington (CSV)
Every place in Washington, sortable · Compare Mattawa with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Mattawa?
21 of the 56 figures for Mattawa on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Mattawa are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' public schools in Mattawa.