Census tract · Washington County
Census Tract 315.18, Washington County, Oregon
Census Tract 315.18, GEOID 41067031518, in Washington County, Oregon, entirely within Oak Hills. 3,435 residents in the ACS 2020-2024 5-year estimates (±565); the 2020 Census counted 3,456.
Residents, 2020-2024
3,435
±565 (90% margin)
2020 Census count: 3,456
Median household income
$147,128
±$32,535 (90% margin)
Washington County: $107,772
Median home value
$614,900
±$15,317 (90% margin)
Washington County: $588,000
Median gross rent
$2,561
±$244 (90% margin)
Washington County: $1,849
Where is Census Tract 315.18?
Census Tract 315.18 is one of 134 census tracts in Washington County, Oregon. It covers 0.38 square miles of land, 9,191 residents per square mile in 2020. Its GEOID, 41067031518, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Oak Hills | 100% |
3 census tracts border Census Tract 315.18: Tract 315.11 ($153,068), Tract 315.14 ($107,835) and Tract 315.17 ($125,700). 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 315.18?
The 2020-2024 American Community Survey puts Census Tract 315.18's population at 3,435 (±565) in 1,205 households; the 2020 Census counted 3,456 residents and 1,229 housing units.
| Measure | Tract 315.18 | Oak Hills |
|---|---|---|
| Total population | 3,435 ±565 | 11,131 |
| Households | 1,205 ±164 | 4,249 |
| Average household size | 2.85 ±0.22 | 2.61 |
| Housing units | 1,205 ±164 | 4,304 |
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 315.18?
The median resident of Census Tract 315.18 is 37.4 years old; 19.8% are under 18 and 12.0% are 65 or older. The largest group is non-Hispanic white residents at 58.4%, then non-Hispanic Asian residents at 26.0%. 27.6% of residents were born outside the United States.
| Measure | Tract 315.18 | Oak Hills |
|---|---|---|
| Median age | 37.4 ±9.2 | 38.6 |
| Under 18 years | 19.8% ±4.6 pts | 23.8% |
| 65 years and over | 12.0% ±3.2 pts | 12.4% |
| Hispanic or Latino (any race) | 4.5% ±3.5 pts | 8.6% |
| White alone, not Hispanic | 58.4% ±12.1 pts | 58.4% |
| Black or African American alone, not Hispanic | 0.5% ±0.9 pts | 0.9% |
| Asian alone, not Hispanic | 26.0% ±12.4 pts | 24.5% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±1.2 pts | 0.2% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±1.2 pts | 0.0% |
| Two or more races, not Hispanic | 10.6% ±8.1 pts | 7.5% |
| Some other race alone, not Hispanic | 0.0% ±1.2 pts | 0.0% |
| Born outside the United States | 27.6% ±8.1 pts | 23.3% |
| Speak a language other than English at home (age 5+) | 31.5% ±9.9 pts | 30.0% |
| Civilian veterans (age 18+) | 3.5% ±2.0 pts | 3.7% |
| With a disability | 8.6% ±3.3 pts | 8.6% |
| No health insurance coverage | 1.4% ±1.4 pts | 3.0% |
| High school graduate or higher (age 25+) | 95.2% ±3.9 pts | 96.5% |
| Bachelor's degree or higher (age 25+) | 63.1% ±7.7 pts | 65.2% |
| Graduate or professional degree (age 25+) | 22.2% ±7.5 pts | 29.0% |
| Lived in the same house a year earlier | 93.8% ±3.5 pts | 88.9% |
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 315.18 earn?
Half of the 1,205 households in Census Tract 315.18 earn less than $147,128 a year (±$32,535), against $107,772 across Washington County: 26th highest of the county's 134 tracts with a reliable estimate.
| Measure | Tract 315.18 | Oak Hills |
|---|---|---|
| Median household income | $147,128 ±$32,535 | $127,179 |
| Mean household income | $164,987 ±$19,478 | $151,455 |
| Per capita income | $57,610 ±$7,968 | $57,829 |
| People below the poverty line | 0.7% ±0.8 pts | 3.4% |
| Children under 18 below the poverty line | 0.0% ±5.7 pts | 2.8% |
| Households receiving SNAP | 1.6% ±2.1 pts | 5.3% |
| Households with a computer | 95.4% ±4.6 pts | 98.5% |
| Households with a broadband subscription | 95.4% ±4.6 pts | 97.6% |
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 315.18?
Owners occupy 74.3% of Census Tract 315.18's occupied homes and renters 25.7%. The median owner-occupied home is valued at $614,900 by its owner (±$15,317). The median renter pays $2,561 a month including utilities, and 32.1% of renters pay 35% or more of their income on rent.
| Measure | Tract 315.18 | Oak Hills |
|---|---|---|
| Median home value (owner-occupied) | $614,900 ±$15,317 | $647,800 |
| Median gross rent | $2,561 ±$244 | $1,935 |
| Renters paying 35% or more of income on rent | 32.1% ±18.4 pts | 33.0% |
| Median monthly owner costs, with a mortgage | $2,670 ±$470 | $2,735 |
| Owner-occupied homes | 74.3% ±8.9 pts | 61.7% |
| Renter-occupied homes | 25.7% ±8.9 pts | 38.3% |
| Housing units | 1,205 ±164 | 4,304 |
| Single-family detached homes | 93.5% ±4.9 pts | 66.3% |
| Mobile homes | 0.0% ±3.3 pts | 0.0% |
| Built 2020 or later | 0.0% ±3.3 pts | 0.0% |
| Built 2010 to 2019 | 0.0% ±3.3 pts | 5.5% |
| Built 1939 or earlier | 0.0% ±3.3 pts | 0.7% |
| Households with no vehicle | 7.2% ±4.9 pts | 6.5% |
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 315.18 get to work?
60.6% of Census Tract 315.18's workers drive alone and 33.1% work from home. The average trip to work takes 18.1 minutes.
| Measure | Tract 315.18 | Oak Hills |
|---|---|---|
| In the labor force (age 16+) | 66.3% ±7.6 pts | 71.8% |
| Unemployment rate | 3.2% ±4.2 pts | 3.1% |
| Drove alone to work | 60.6% ±13.9 pts | 57.2% |
| Carpooled | 3.3% ±3.3 pts | 5.5% |
| Public transportation | 2.1% ±3.2 pts | 2.2% |
| Walked | 1.0% ±1.3 pts | 2.8% |
| Worked from home | 33.1% ±14.5 pts | 31.4% |
| Mean travel time to work | 18.1 min ±1.3 | 21.3 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 315.18 compare with the other tracts in Washington County?
Among Washington County's tracts with a reliable estimate, Census Tract 315.18 ranks as shown below (1 = highest).
| Measure | In Washington County | In Oak Hills |
|---|---|---|
| Population | 95th of 134 | 2nd of 3 |
| Residents per square mile | 12th of 134 | 2nd of 3 |
| Median household income | 26th of 134 | 1st of 3 |
| Per capita income | 48th of 134 | 2nd of 3 |
| Median home value | 48th of 131 | 3rd of 3 |
| Median gross rent | 12th of 131 | 1st of 3 |
| Bachelor's degree or higher | 18th of 134 | 2nd of 3 |
| Median age | 83rd of 134 | 3rd of 3 |
| Owner-occupied share | 47th of 132 | 1st of 3 |
The tracts next to it on Washington County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 318.14 | 23rd | $149,500±$27,282 · within the margin of this tract |
| Tract 302 | 24th | $149,188±$21,591 · within the margin of this tract |
| Tract 323.02 | 25th | $149,076±$36,730 · within the margin of this tract |
| Tract 315.18 | 26th | $147,128±$32,535 |
| Tract 318.04 | 27th | $146,433±$44,225 · within the margin of this tract |
| Tract 322.02 | 28th | $146,414±$32,766 · within the margin of this tract |
| Tract 318.13 | 29th | $145,652±$28,186 · 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 315.18?
3 of the 18 figures for Census Tract 315.18 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.
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