City · Washington
Mountlake Terrace, Washington
Mountlake Terrace, city, in Snohomish County, Washington. Mountlake Terrace had 25,430 residents on July 1, 2025 by the Census Bureau's estimate, up 19.4% since 2020; the 2020 Census counted 21,286 and the ACS 2020-2024 5-year estimates put it at 23,104 (±48). GEOID 5347490.
Residents, July 2025 estimate
25,430
Census Bureau estimate (no margin published)
2020 Census count: 21,286 · ACS 2020-2024: 23,104 ±48
Median household income
$107,687
±$5,732 (90% margin)
Washington: $98,141
Median home value
$667,300
±$23,603 (90% margin)
Washington: $564,600
Median gross rent
$2,004
±$86 (90% margin)
Washington: $1,760
Where is Mountlake Terrace and what county is it in?
Mountlake Terrace is a city in Snohomish County, Washington. It covers 4.1 square miles of land, 5,248 residents per square mile in 2020.
Mountlake Terrace is in the Seattle-Tacoma-Bellevue, WA metropolitan statistical area, which takes in 3 counties (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 Mountlake Terrace, and is it growing?
The Census Bureau estimates that 25,430 people lived in Mountlake Terrace on July 1, 2025, up 19.4% since 2020, faster than Washington (+3.8%). The 2020 Census counted 21,286 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 23,104 (±48).
| Measure | Mountlake Terrace | Snohomish County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 23,104 ±48 | 844,430 | +1,894 |
| Households | 9,855 ±382 | 316,212 | +1,298 |
| Average household size | 2.32 ±0.09 | 2.64 | −0.14 |
| Housing units | 10,210 ±395 | 331,530 | +1,263 |
Mountlake Terrace's population since 2000
From 20,362 in 2000 to 25,430 in 2025: up 24.9%. The 2000, 2010 and 2020 figures are census counts, each for Mountlake Terrace 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 Mountlake Terrace?
The median resident of Mountlake Terrace is 38.3 years old; 17.0% are under 18 and 16.5% are 65 or older. The largest group is non-Hispanic white residents at 59.8%, then Hispanic or Latino residents (of any race) at 15.3%. 18.5% of residents were born outside the United States.
| Measure | Mountlake Terrace | Snohomish County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 38.3 ±1.3 | 38.6 | no clear change |
| Under 18 years | 17.0% ±1.7 pts | 22.1% | – |
| 65 years and over | 16.5% ±1.7 pts | 14.8% | – |
| Male | 49.5% ±1.8 pts | 50.4% | – |
| Hispanic or Latino (any race) | 15.3% ±3.0 pts | 12.1% | +4.7 pts |
| White alone, not Hispanic | 59.8% ±3.5 pts | 62.0% | no clear change |
| Black or African American alone, not Hispanic | 4.2% ±1.3 pts | 3.6% | −3.2 pts |
| Asian alone, not Hispanic | 11.5% ±1.9 pts | 13.6% | no clear change |
| American Indian and Alaska Native alone, not Hispanic | 0.4% ±0.3 pts | 0.6% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.3% ±0.3 pts | 0.5% | – |
| Two or more races, not Hispanic | 8.1% ±1.8 pts | 6.9% | – |
| Some other race alone, not Hispanic | 0.4% ±0.5 pts | 0.7% | – |
| Born outside the United States | 18.5% ±2.4 pts | 19.3% | −5.1 pts |
| Speak a language other than English at home (age 5+) | 23.5% ±3.2 pts | 24.4% | – |
| Civilian veterans (age 18+) | 5.0% ±0.9 pts | 6.9% | – |
| With a disability | 13.4% ±1.9 pts | 12.4% | – |
| No health insurance coverage | 7.1% ±2.1 pts | 6.2% | no clear change |
| High school graduate or higher (age 25+) | 94.3% ±1.5 pts | 93.1% | – |
| Bachelor's degree or higher (age 25+) | 43.0% ±3.3 pts | 38.2% | +6.8 pts |
| Graduate or professional degree (age 25+) | 14.9% ±2.1 pts | 13.4% | – |
| Lived in the same house a year earlier | 83.1% ±3.0 pts | 87.3% | – |
| Moved from another state in the past year | 3.5% ±1.6 pts | 1.8% | – |
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 Mountlake Terrace earn?
Half of Mountlake Terrace's 9,855 households earn less than $107,687 a year (±$5,732), against $111,246 in Snohomish County and $98,141 in Washington. In 2015-2019 the median was $89,785 in 2024 dollars, so it rose by $17,902 after inflation. 7.0% of residents live below the poverty line.
| Measure | Mountlake Terrace | Snohomish County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $107,687 ±$5,732 | $111,246 | +$17,902 |
| Mean household income | $135,606 ±$11,056 | $142,821 | – |
| Per capita income | $59,528 ±$5,387 | $54,628 | +$15,008 |
| People below the poverty line | 7.0% ±1.8 pts | 8.0% | no clear change |
| Children under 18 below the poverty line | 5.9% ±3.9 pts | 9.2% | – |
| Households receiving SNAP | 6.1% ±1.7 pts | 8.8% | – |
| Households with a computer | 97.3% ±1.3 pts | 97.7% | – |
| Households with a broadband subscription | 93.5% ±2.0 pts | 94.4% | – |
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 Mountlake Terrace?
Owners occupy 56.9% of Mountlake Terrace's occupied homes and renters 43.1%. The median owner-occupied home is valued at $667,300 by its owner (±$23,603). The median renter pays $2,004 a month including utilities, and 34.9% of renters pay 35% or more of their income on rent.
| Measure | Mountlake Terrace | Snohomish County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $667,300 ±$23,603 | $696,000 | +$184,130 |
| Median gross rent | $2,004 ±$86 | $1,949 | +$202 |
| Renters paying 35% or more of income on rent | 34.9% ±7.2 pts | 41.9% | no clear change |
| Median monthly owner costs, with a mortgage | $2,580 ±$118 | $2,748 | – |
| Owner-occupied homes | 56.9% ±3.7 pts | 68.2% | no clear change |
| Renter-occupied homes | 43.1% ±3.7 pts | 31.8% | – |
| Housing units | 10,210 ±395 | 331,530 | +1,263 |
| Homeowner vacancy rate | 0.7% ±0.9 pts | 0.5% | – |
| Rental vacancy rate | 2.0% ±1.9 pts | 4.0% | – |
| Single-family detached homes | 50.6% ±3.2 pts | 63.9% | – |
| Mobile homes | 1.5% ±0.9 pts | 4.6% | – |
| Built 2020 or later | 2.7% ±1.3 pts | 2.6% | – |
| Built 2010 to 2019 | 8.3% ±2.0 pts | 12.2% | – |
| Built 1939 or earlier | 0.5% ±0.4 pts | 4.9% | – |
| Households with no vehicle | 4.4% ±1.4 pts | 4.7% | – |
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 Mountlake Terrace building?
Builders took permits for 15 new housing units in Mountlake Terrace in 2025 (15 in single-family houses), 0.6 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 Mountlake Terrace work and get to work?
62.6% of Mountlake Terrace's workers drive alone and 21.9% work from home. The average trip to work takes 27.9 minutes. The unemployment rate in 2020-2024 averaged 4.2%.
| Measure | Mountlake Terrace | Snohomish County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 69.9% ±2.3 pts | 67.3% | – |
| Unemployment rate | 4.2% ±1.3 pts | 4.5% | no clear change |
| Drove alone to work | 62.6% ±3.8 pts | 65.0% | – |
| Carpooled | 9.0% ±2.3 pts | 9.1% | – |
| Public transportation | 3.3% ±1.4 pts | 2.8% | – |
| Walked | 1.0% ±0.6 pts | 1.6% | – |
| Worked from home | 21.9% ±3.3 pts | 20.0% | +16.9 pts |
| Mean travel time to work | 27.9 min ±1.4 | 30.8 min | −3.8 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 Mountlake Terrace?
5 census tracts lie mostly in Mountlake Terrace, and 4 more reach into it (2020 census blocks). Their median household incomes run from $103,214 (Tract 512) to $120,889 (Tract 513.01).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 511Snohomish County | 5,002 | $103,721 |
| Tract 512Snohomish County | 4,747 | $103,214 |
| Tract 510Snohomish County | 4,971 | $105,553 |
| Tract 513.01Snohomish County | 4,262 | $120,889 |
| Tract 513.02Snohomish County | 4,025 | $114,500 |
| Tract 519.29Snohomish County | 4,350 | $91,684 |
| Tract 504.02Snohomish County | 5,587 | $123,171 |
| Tract 514.01Snohomish County | 3,808 | $61,096 |
| Tract 509Snohomish County | 3,524 | $73,750 |
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 Mountlake Terrace) · Census block assignment files
How does Mountlake Terrace compare with other places in Washington?
By the Census Bureau's July 2025 estimates, Mountlake Terrace is the 1,586th-most populous of the 19,476 U.S. incorporated places that have one and the 45th-most populous of 281 in Washington.
Mountlake Terrace ranks 130th 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 | 45th | 281 |
| Growth 2020-2025 (PEP) | 14th | 203 |
| Residents per square mile | 13th | 394 |
| Median household income | 130th | 387 |
| Per capita income | 84th | 393 |
| Median home value | 105th | 384 |
| Median gross rent | 88th | 351 |
| Poverty rate | 196th | 281 |
| Bachelor's degree or higher | 96th | 382 |
| Median age | 223rd | 394 |
| Owner-occupied share | 322nd | 388 |
| Work from home | 97th | 307 |
| Travel time to work | 177th | 394 |
Mountlake Terrace's figures with every place in Washington (CSV)
Every place in Washington, sortable · Compare Mountlake Terrace 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 Mountlake Terrace?
7 of the 57 figures for Mountlake Terrace 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 Mountlake Terrace 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 Mountlake Terrace.