Lake Oswego, Oregon demographics

Lake Oswego, OR demographics: median age 46.7; 74.8% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Lake Oswego city, Oregon · Incorporated city · GEOID 4140550. The survey estimates a population of 40,381 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Lake Oswego is 46.7 years, with a 90% margin of error of 1.5 years. There are 16,873 households (±445). Age and household distributions show how these totals are composed; they do not establish which neighborhood suits a particular person.

Every count and share is an estimate. “±” is a 90% margin of error (MOE); pp means percentage points. Derived shares use the category count divided by the named universe. Aggregated category MOEs and percentage MOEs are approximate. A margin larger than half its estimate is flagged as low precision. Blank source uncertainty is shown as unavailable, never zero.

Age distribution and sex

City, state and U.S. estimates · ACS 2020–2024
Measure / survey universe	City estimate ± MOE	State estimate ± MOE	U.S. estimate ± MOE
Median age Total population · years	46.7 ±1.5	40.4 ±0.2	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 40,381
Category	Count ± MOE	Share ± MOE (pp)	Oregon	U.S.
Under 18	8,949 ±744	22.2% ±1.8 pp	19.9%	22.0%
18–34	4,785 ±526	11.8% ±1.3 pp	22.5%	22.8%
35–64	17,146 ±918	42.5% ±2.3 pp	38.5%	38.0%
65 and older	9,501 ±602	23.5% ±1.5 pp	19.1%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 40,381
Category	Count ± MOE	Share ± MOE (pp)	Oregon	U.S.
Male	20,401 ±519	50.5% ±1.3 pp	49.9%	49.5%
Female	19,980 ±514	49.5% ±1.3 pp	50.1%	50.5%

The age groups are mutually exclusive and cover the entire population. The sex categories follow this ACS table’s published classification; they are not a survey of gender identity.

Race and Hispanic origin

Race · B02001 · ACS 2020–2024 Total population: 40,381
Category	Count ± MOE	Share ± MOE (pp)	Oregon	U.S.
White alone	31,048 ±966	76.9% ±2.4 pp	74.6%	61.0%
Black or African American alone	269 ±165 · low precision	0.7% ±0.4 pp · low precision	1.9%	12.2%
American Indian and Alaska Native alone	104 ±87 · low precision	0.3% ±0.2 pp · low precision	1.1%	0.9%
Asian alone	3,696 ±637	9.2% ±1.6 pp	4.5%	6.0%
Native Hawaiian and Other Pacific Islander alone	55 ±53 · low precision	0.1% ±0.1 pp · low precision	0.4%	0.2%
Some other race alone	641 ±294	1.6% ±0.7 pp	5.2%	7.1%
Two or more races	4,568 ±770	11.3% ±1.9 pp	12.3%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 40,381
Category	Count ± MOE	Share ± MOE (pp)	Oregon	U.S.
Not Hispanic or Latino	38,094 ±551	94.3% ±1.4 pp	85.3%	80.7%
Hispanic or Latino	2,287 ±548	5.7% ±1.4 pp	14.7%	19.3%

Hispanic origin and race are separate questions. People of Hispanic or Latino origin may be of any race and appear in both tables. Do not add the Hispanic share to race shares. Race alone and two-or-more-race groups are the mutually exclusive categories of the race table.

Household types, children and living alone

Household types · B11001 · ACS 2020–2024 Households: 16,873
Category	Count ± MOE	Share ± MOE (pp)	Oregon	U.S.
Married-couple family	9,869 ±328	58.5% ±1.2 pp	46.7%	46.9%
Other family: male householder, no spouse present	437 ±131	2.6% ±0.8 pp	4.9%	5.1%
Other family: female householder, no spouse present	1,195 ±274	7.1% ±1.6 pp	10.1%	12.2%
Nonfamily: householder living alone	4,478 ±451	26.5% ±2.6 pp	28.4%	28.7%
Nonfamily: householder not living alone	894 ±196	5.3% ±1.2 pp	9.9%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 16,873
Category	Count ± MOE	Share ± MOE (pp)	Oregon	U.S.
Households with people under 18	5,175 ±297	30.7% ±1.6 pp	27.2%	29.5%
Households without people under 18	11,698 ±512	69.3% ±2.4 pp	72.8%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 16,873
Category	Count ± MOE	Share ± MOE (pp)	Oregon	U.S.
One-person nonfamily households	4,478 ±451	26.5% ±2.6 pp	28.4%	28.7%
Two-person households	6,632 ±502	39.3% ±2.8 pp	36.7%	33.8%
Three-person households	2,409 ±321	14.3% ±1.9 pp	15.0%	15.3%
Four-person households	2,640 ±328	15.6% ±1.9 pp	11.8%	12.6%
Five-person households	487 ±129	2.9% ±0.8 pp	5.0%	5.9%
Six-person households	194 ±101 · low precision	1.1% ±0.6 pp · low precision	1.9%	2.2%
Seven or more people	33 ±43 · low precision	0.2% ±0.3 pp · low precision	1.2%	1.4%

A family household contains related people under the Census definition. A nonfamily household can contain one person or unrelated people sharing a home. Households with children can also appear in the household-type and size tables, so those tables must not be added together. Household estimates exclude people living in group quarters from the household universe.

Nativity and languages spoken at home

Nativity · B05002 · ACS 2020–2024 Total population: 40,381
Category	Count ± MOE	Share ± MOE (pp)	Oregon	U.S.
Native	35,742 ±618	88.5% ±1.5 pp	90.2%	85.9%
Foreign born	4,639 ±625	11.5% ±1.5 pp	9.8%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 38,357
Category	Count ± MOE	Share ± MOE (pp)	Oregon	U.S.
English only	33,429 ±826	87.2% ±2.0 pp	84.8%	77.7%
Spanish	806 ±325	2.1% ±0.8 pp	9.0%	13.6%
French, Haitian, or Cajun	308 ±137	0.8% ±0.4 pp	0.3%	0.7%
German or other West Germanic	203 ±98	0.5% ±0.3 pp	0.4%	0.5%
Russian, Polish, or other Slavic	296 ±157 · low precision	0.8% ±0.4 pp · low precision	0.8%	0.7%
Other Indo-European	662 ±281	1.7% ±0.7 pp	1.0%	2.0%
Korean	625 ±319 · low precision	1.6% ±0.8 pp · low precision	0.3%	0.3%
Chinese, including Mandarin and Cantonese	1,008 ±380	2.6% ±1.0 pp	0.8%	1.1%
Vietnamese	51 ±59 · low precision	0.1% ±0.2 pp · low precision	0.6%	0.5%
Tagalog, including Filipino	231 ±175 · low precision	0.6% ±0.5 pp · low precision	0.3%	0.6%
Other Asian and Pacific Island	427 ±240 · low precision	1.1% ±0.6 pp · low precision	1.1%	1.1%
Arabic	132 ±95 · low precision	0.3% ±0.2 pp · low precision	0.2%	0.5%
Other and unspecified	179 ±130 · low precision	0.5% ±0.3 pp · low precision	0.5%	0.8%

Foreign born means not a U.S. citizen at birth; it includes naturalized citizens. Language categories describe speech at home among people age five and older. A language other than English at home does not establish that someone cannot speak English. This city page uses the published C16001 summary categories because the more detailed B16001 table does not provide these city records in this release.

Educational attainment

Highest completed education · B15003 · ACS 2020–2024 Population age 25 and older: 29,915
Category	Count ± MOE	Share ± MOE (pp)	Oregon	U.S.
Less than high school graduate	300 ±130	1.0% ±0.4 pp	8.2%	10.4%
High school graduate or equivalency	1,786 ±348	6.0% ±1.2 pp	22.4%	26.0%
Some college, no degree	3,721 ±406	12.4% ±1.3 pp	23.5%	19.1%
Associate’s degree	1,727 ±303	5.8% ±1.0 pp	9.1%	8.8%
Bachelor’s degree	12,168 ±714	40.7% ±2.2 pp	22.7%	21.6%
Graduate or professional degree	10,213 ±774	34.1% ±2.5 pp	14.1%	14.1%

The denominator excludes residents under 25. Each person is counted in the highest attainment category they completed. This table does not measure the quality of local schools or the education level of every current student.

Residence one year earlier

Geographic mobility · B07003 · ACS 2020–2024 Population age 1 and older: 39,846
Category	Count ± MOE	Share ± MOE (pp)	Oregon	U.S.
Same house	33,854 ±967	85.0% ±2.3 pp	86.0%	87.7%
Moved within same county	1,732 ±477	4.3% ±1.2 pp	7.0%	6.3%
Moved from a different county in the same state	2,165 ±517	5.4% ±1.3 pp	3.4%	3.1%
Moved from a different state	1,865 ±536	4.7% ±1.3 pp	3.0%	2.3%
Moved from abroad	230 ±159 · low precision	0.6% ±0.4 pp · low precision	0.5%	0.6%

These are respondents’ residence patterns one year before their survey response, pooled across the five-year window. They are not a net migration count for 2025. A person can move to a different house within the same city or county; moves within the same county should not automatically be interpreted as new arrivals to the city.

Health insurance, internet access and veterans

2.4% of Lake Oswego residents (±0.6 percentage points) had no health insurance coverage when surveyed, compared with 5.9% in Oregon and 8.4% nationally. 97.2% of households subscribe to broadband of any type, including cellular data plans. A subscription is not the same as available service: the FCC National Broadband Map shows providers at a specific address.

City, state and U.S. shares · ACS 2020–2024
Measure	Lake Oswego	Oregon	U.S.	Compared with Oregon
People without health insurance Civilian noninstitutionalized population	2.4% ±0.6 pp	5.9%	8.4%	Lower
Households with a broadband subscription Households	97.2% ±3.6 pp	92.4%	91.0%	Higher
Veterans Civilian population age 18 and older	4.9% ±0.8 pp	7.2%	6.2%	Lower

Reading and reusing the estimates

The Census table links above lead to the original detailed tables. Counts, source universes and uncertainty are retained in the source observation download for Lake Oswego . Compare these figures with the same survey window; do not compare one city’s five-year estimate with another city’s annual estimate as though they measured the same period. For methods, see uncertainty and denominator calculations.

Read Lake Oswego housing and cost context or return to the city profile.