Census tract · Snohomish County
Census Tract 511, Snohomish County, Washington
Census Tract 511, GEOID 53061051100, in Snohomish County, Washington, mostly within Mountlake Terrace (98% of its census blocks). 5,002 residents in the ACS 2020-2024 5-year estimates (±443); the 2020 Census counted 4,182.
Residents, 2020-2024
5,002
±443 (90% margin)
2020 Census count: 4,182
Median household income
$103,721
±$11,754 (90% margin)
Snohomish County: $111,246
Median home value
$629,100
±$39,625 (90% margin)
Snohomish County: $696,000
Median gross rent
$2,093
±$173 (90% margin)
Snohomish County: $1,949
Where is Census Tract 511?
Census Tract 511 is one of 175 census tracts in Snohomish County, Washington. It covers 0.79 square miles of land, 5,267 residents per square mile in 2020. Its GEOID, 53061051100, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Mountlake Terrace | 98% |
5 census tracts border Census Tract 511: Tract 204.01 in King County ($102,237), Tract 204.02 in King County ($121,212), Tract 510 ($105,553), Tract 512 ($103,214) and Tract 513.02 ($114,500). The figure in brackets is each tract's median household income.
Whether a tract counts as low- or moderate-income for bank lending (the Community Reinvestment Act) is set by the FFIEC against its metro area's family income: look it up in the FFIEC census geocoder.
Source: 2024 Gazetteer and 2020 block assignment files, U.S. Census Bureau · Census reference files
How many people live in Census Tract 511?
The 2020-2024 American Community Survey puts Census Tract 511's population at 5,002 (±443) in 2,386 households; the 2020 Census counted 4,182 residents and 1,872 housing units.
| Measure | Tract 511 | Mountlake Terrace |
|---|---|---|
| Total population | 5,002±443 | 23,104 |
| Households | 2,386±195 | 9,855 |
| Average household size | 2.06±0.13 | 2.32 |
| Housing units | 2,428±180 | 10,210 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Census Tract 511?
The median resident of Census Tract 511 is 37.8 years old; 13.6% are under 18 and 23.9% are 65 or older. The largest group is non-Hispanic white residents at 63.9%, then non-Hispanic Asian residents at 13.8%. 16.8% of residents were born outside the United States.
| Measure | Tract 511 | Mountlake Terrace |
|---|---|---|
| Median age | 37.8±3.2 | 38.3 |
| Under 18 years | 13.6%±2.4 pts | 17.0% |
| 65 years and over | 23.9%±5.5 pts | 16.5% |
| Hispanic or Latino (any race) | 12.6%±4.0 pts | 15.3% |
| White alone, not Hispanic | 63.9%±6.3 pts | 59.8% |
| Black or African American alone, not Hispanic | 1.5%±1.4 pts | 4.2% |
| Asian alone, not Hispanic | 13.8%±5.7 pts | 11.5% |
| American Indian and Alaska Native alone, not Hispanic | 0.4%±0.5 pts | 0.4% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.8 pts | 0.3% |
| Two or more races, not Hispanic | 7.7%±4.5 pts | 8.1% |
| Some other race alone, not Hispanic | 0.2%±0.3 pts | 0.4% |
| Born outside the United States | 16.8%±3.8 pts | 18.5% |
| Speak a language other than English at home (age 5+) | 24.0%±6.6 pts | 23.5% |
| Civilian veterans (age 18+) | 6.1%±2.2 pts | 5.0% |
| With a disability | 17.4%±4.2 pts | 13.4% |
| No health insurance coverage | 4.2%±3.5 pts | 7.1% |
| High school graduate or higher (age 25+) | 94.7%±2.6 pts | 94.3% |
| Bachelor's degree or higher (age 25+) | 40.0%±7.4 pts | 43.0% |
| Graduate or professional degree (age 25+) | 13.1%±3.9 pts | 14.9% |
| Lived in the same house a year earlier | 84.6%±5.1 pts | 83.1% |
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 Census Tract 511 earn?
Half of the 2,386 households in Census Tract 511 earn less than $103,721 a year (±$11,754), against $111,246 across Snohomish County: 109th highest of the county's 173 tracts with a reliable estimate. 8.6% of residents live below the poverty line.
| Measure | Tract 511 | Mountlake Terrace |
|---|---|---|
| Median household income | $103,721±$11,754 | $107,687 |
| Mean household income | $114,347±$11,153 | $135,606 |
| Per capita income | $55,619±$5,506 | $59,528 |
| People below the poverty line | 8.6%±5.0 pts | 7.0% |
| Children under 18 below the poverty line | 9.0%±12.8 pts | 5.9% |
| Households receiving SNAP | 6.8%±4.3 pts | 6.1% |
| Households with a computer | 93.3%±4.5 pts | 97.3% |
| Households with a broadband subscription | 90.9%±4.9 pts | 93.5% |
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 Census Tract 511?
Owners occupy 54.9% of Census Tract 511's occupied homes and renters 45.1%. The median owner-occupied home is valued at $629,100 by its owner (±$39,625). The median renter pays $2,093 a month including utilities, and 37.3% of renters pay 35% or more of their income on rent.
| Measure | Tract 511 | Mountlake Terrace |
|---|---|---|
| Median home value (owner-occupied) | $629,100±$39,625 | $667,300 |
| Median gross rent | $2,093±$173 | $2,004 |
| Renters paying 35% or more of income on rent | 37.3%±14.2 pts | 34.9% |
| Median monthly owner costs, with a mortgage | $2,553±$255 | $2,580 |
| Owner-occupied homes | 54.9%±7.8 pts | 56.9% |
| Renter-occupied homes | 45.1%±7.8 pts | 43.1% |
| Housing units | 2,428±180 | 10,210 |
| Single-family detached homes | 55.0%±6.6 pts | 50.6% |
| Mobile homes | 3.3%±2.8 pts | 1.5% |
| Built 2020 or later | 10.6%±5.0 pts | 2.7% |
| Built 2010 to 2019 | 21.8%±7.2 pts | 8.3% |
| Built 1939 or earlier | 0.5%±0.7 pts | 0.5% |
| Households with no vehicle | 10.3%±4.4 pts | 4.4% |
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 Census Tract 511 get to work?
64.7% of Census Tract 511's workers drive alone and 16.9% work from home. The average trip to work takes 29.5 minutes.
| Measure | Tract 511 | Mountlake Terrace |
|---|---|---|
| In the labor force (age 16+) | 65.9%±5.6 pts | 69.9% |
| Unemployment rate | 2.3%±1.9 pts | 4.2% |
| Drove alone to work | 64.7%±7.2 pts | 62.6% |
| Carpooled | 6.8%±3.6 pts | 9.0% |
| Public transportation | 2.6%±2.2 pts | 3.3% |
| Walked | 1.9%±1.8 pts | 1.0% |
| Worked from home | 16.9%±5.0 pts | 21.9% |
| Mean travel time to work | 29.5 min±3.8 | 27.9 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
How does Census Tract 511 compare with the other tracts in Snohomish County?
Among Snohomish County's tracts with a reliable estimate, Census Tract 511 ranks as shown below (1 = highest).
| Measure | In Snohomish County | In Mountlake Terrace |
|---|---|---|
| Population | 84th of 173 | 1st of 5 |
| Residents per square mile | 57th of 173 | 4th of 5 |
| Median household income | 109th of 173 | 4th of 5 |
| Per capita income | 77th of 173 | 4th of 5 |
| Median home value | 109th of 172 | 5th of 5 |
| Median gross rent | 71st of 166 | 1st of 5 |
| Poverty rate | 52nd of 103 | 1st of 4 |
| Bachelor's degree or higher | 78th of 173 | 5th of 5 |
| Median age | 102nd of 173 | 2nd of 5 |
| Owner-occupied share | 135th of 173 | 4th of 5 |
The tracts next to it on Snohomish County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 529.06 | 106th | $104,359±$11,805 · within the margin of this tract |
| Tract 9400.02 | 107th | $103,920±$12,312 · within the margin of this tract |
| Tract 528.09 | 108th | $103,750±$13,158 · within the margin of this tract |
| Tract 511 | 109th | $103,721±$11,754 |
| Tract 512 | 110th | $103,214±$21,917 · within the margin of this tract |
| Tract 411 | 111th | $102,892±$15,300 · within the margin of this tract |
| Tract 516.01 | 112th | $102,004±$30,482 · within the margin of this tract |
"Within the margin": the two incomes differ by less than their combined 90% margins, so the survey cannot say which is higher and the ranks between them are not firm.
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · How ranks are computed
How reliable are the figures for Census Tract 511?
1 of the 18 figures for Census Tract 511 on this page carries a coefficient of variation over 40% and is marked with a ring: they come from a small sample, so read them as rough.
A census tract's figures rest on a few hundred sampled households over five years, so its margins are wider than a city's. Two tracts differ only when the gap between them is larger than their combined 90% margin (the square root of the sum of the two squared margins). 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 · Check it at data.census.gov
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections