Census-designated place · Washington
Martha Lake, Washington
Martha Lake, census-designated place, in Snohomish County, Washington. Martha Lake had 22,634 people in the ACS 2020-2024 5-year estimates (±1,834). GEOID 5343815.
Residents, 2020-2024
22,634
±1,834 (90% margin)
2020 Census count: 21,660
Median household income
$124,494
±$14,457 (90% margin)
Washington: $98,141
Median home value
$785,400
±$43,988 (90% margin)
Washington: $564,600
Median gross rent
$2,185
±$91 (90% margin)
Washington: $1,760
Where is Martha Lake and what county is it in?
Martha Lake is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in Snohomish County, Washington. It covers 4.6 square miles of land, 4,757 residents per square mile in 2020.
Martha Lake 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 Martha Lake, and is it growing?
The 2020-2024 American Community Survey puts Martha Lake's population at 22,634 (±1,834). The 2020 Census counted 21,660 residents.
The Census Bureau publishes yearly population estimates for incorporated places only; Martha Lake is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | Martha Lake | Snohomish County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 22,634 ±1,834 | 844,430 | no clear change |
| Households | 8,113 ±584 | 316,212 | +907 |
| Average household size | 2.78 ±0.16 | 2.64 | no clear change |
| Housing units | 8,160 ±561 | 331,530 | +856 |
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 Martha Lake?
The median resident of Martha Lake is 34.7 years old; 24.0% are under 18 and 10.6% are 65 or older. The largest group is non-Hispanic white residents at 46.2%, then non-Hispanic Asian residents at 25.1%. 29.1% of residents were born outside the United States.
| Measure | Martha Lake | Snohomish County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 34.7 ±1.5 | 38.6 | no clear change |
| Under 18 years | 24.0% ±3.2 pts | 22.1% | – |
| 65 years and over | 10.6% ±2.0 pts | 14.8% | – |
| Male | 49.4% ±2.2 pts | 50.4% | – |
| Hispanic or Latino (any race) | 13.6% ±4.4 pts | 12.1% | no clear change |
| White alone, not Hispanic | 46.2% ±5.3 pts | 62.0% | −21.0 pts |
| Black or African American alone, not Hispanic | 3.8% ±1.9 pts | 3.6% | +2.2 pts |
| Asian alone, not Hispanic | 25.1% ±4.7 pts | 13.6% | +8.5 pts |
| American Indian and Alaska Native alone, not Hispanic | 0.6% ±0.4 pts | 0.6% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.4% ±0.6 pts | 0.5% | – |
| Two or more races, not Hispanic | 7.4% ±1.9 pts | 6.9% | – |
| Some other race alone, not Hispanic | 2.7% ±2.1 pts | 0.7% | – |
| Born outside the United States | 29.1% ±4.0 pts | 19.3% | +8.3 pts |
| Speak a language other than English at home (age 5+) | 37.2% ±6.0 pts | 24.4% | – |
| Civilian veterans (age 18+) | 4.5% ±1.4 pts | 6.9% | – |
| With a disability | 8.6% ±1.7 pts | 12.4% | – |
| No health insurance coverage | 5.3% ±2.4 pts | 6.2% | no clear change |
| High school graduate or higher (age 25+) | 93.5% ±2.1 pts | 93.1% | – |
| Bachelor's degree or higher (age 25+) | 50.3% ±3.8 pts | 38.2% | +9.5 pts |
| Graduate or professional degree (age 25+) | 15.8% ±2.9 pts | 13.4% | – |
| Lived in the same house a year earlier | 86.4% ±3.5 pts | 87.3% | – |
| Moved from another state in the past year | 0.5% ±0.4 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 Martha Lake earn?
Half of Martha Lake's 8,113 households earn less than $124,494 a year (±$14,457), against $111,246 in Snohomish County and $98,141 in Washington. In 2015-2019 it was $125,920 in 2024 dollars; the margins of error cannot tell the two periods apart. 8.3% of residents live below the poverty line.
| Measure | Martha Lake | Snohomish County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $124,494 ±$14,457 | $111,246 | no clear change |
| Mean household income | $153,776 ±$9,077 | $142,821 | – |
| Per capita income | $56,210 ±$4,448 | $54,628 | +$6,170 |
| People below the poverty line | 8.3% ±2.5 pts | 8.0% | no clear change |
| Children under 18 below the poverty line | 12.4% ±6.0 pts | 9.2% | +7.9 pts |
| Households receiving SNAP | 9.2% ±2.8 pts | 8.8% | – |
| Households with a computer | 98.9% ±0.9 pts | 97.7% | – |
| Households with a broadband subscription | 98.0% ±1.4 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 Martha Lake?
Owners occupy 63.2% of Martha Lake's occupied homes and renters 36.8%. The median owner-occupied home is valued at $785,400 by its owner (±$43,988). The median renter pays $2,185 a month including utilities, and 36.0% of renters pay 35% or more of their income on rent.
| Measure | Martha Lake | Snohomish County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $785,400 ±$43,988 | $696,000 | +$220,142 |
| Median gross rent | $2,185 ±$91 | $1,949 | no clear change |
| Renters paying 35% or more of income on rent | 36.0% ±8.8 pts | 41.9% | no clear change |
| Median monthly owner costs, with a mortgage | $3,128 ±$249 | $2,748 | – |
| Owner-occupied homes | 63.2% ±4.5 pts | 68.2% | no clear change |
| Renter-occupied homes | 36.8% ±4.5 pts | 31.8% | – |
| Housing units | 8,160 ±561 | 331,530 | +856 |
| Homeowner vacancy rate | 0.0% ±0.8 pts | 0.5% | – |
| Rental vacancy rate | 1.5% ±2.4 pts | 4.0% | – |
| Single-family detached homes | 56.9% ±4.6 pts | 63.9% | – |
| Mobile homes | 1.2% ±1.1 pts | 4.6% | – |
| Built 2020 or later | 1.3% ±0.9 pts | 2.6% | – |
| Built 2010 to 2019 | 24.4% ±5.1 pts | 12.2% | – |
| Built 1939 or earlier | 1.5% ±1.6 pts | 4.9% | – |
| Households with no vehicle | 1.9% ±1.2 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 do people in Martha Lake work and get to work?
60.5% of Martha Lake's workers drive alone and 26.2% work from home. The average trip to work takes 27.8 minutes. The unemployment rate in 2020-2024 averaged 4.3%.
| Measure | Martha Lake | Snohomish County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 75.5% ±3.0 pts | 67.3% | – |
| Unemployment rate | 4.3% ±1.6 pts | 4.5% | no clear change |
| Drove alone to work | 60.5% ±4.5 pts | 65.0% | – |
| Carpooled | 10.1% ±3.1 pts | 9.1% | – |
| Public transportation | 1.4% ±0.8 pts | 2.8% | – |
| Walked | 0.8% ±0.8 pts | 1.6% | – |
| Worked from home | 26.2% ±4.8 pts | 20.0% | +18.5 pts |
| Mean travel time to work | 27.8 min ±1.7 | 30.8 min | −7.2 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 Martha Lake?
3 census tracts lie mostly in Martha Lake, and 3 more reach into it (2020 census blocks). Their median household incomes run from $126,500 (Tract 519.33) to $171,971 (Tract 519.27).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 417.03Snohomish County | 6,903 | $141,831 |
| Tract 519.27Snohomish County | 6,397 | $171,971 |
| Tract 519.33Snohomish County | 4,870 | $126,500 |
| Tract 417.04Snohomish County | 6,026 | $98,994 |
| Tract 519.28Snohomish County | 5,262 | $106,676 |
| Tract 519.21Snohomish County | 5,612 | $126,502 |
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 Martha Lake) · Census block assignment files
How does Martha Lake compare with other places in Washington?
Martha Lake ranks 87th of 387 places in Washington with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population (ACS 2020-2024) | 61st | 393 |
| Residents per square mile | 23rd | 394 |
| Median household income | 87th | 387 |
| Per capita income | 98th | 393 |
| Median home value | 65th | 384 |
| Median gross rent | 64th | 351 |
| Poverty rate | 164th | 281 |
| Bachelor's degree or higher | 62nd | 382 |
| Median age | 320th | 394 |
| Owner-occupied share | 264th | 388 |
| Work from home | 62nd | 307 |
| Travel time to work | 179th | 394 |
Martha Lake's figures with every place in Washington (CSV)
Every place in Washington, sortable · Compare Martha Lake 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 Martha Lake?
10 of the 57 figures for Martha Lake 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 Martha Lake 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' school search.