Olathe, Kansas demographics

Olathe, KS demographics: median age 37.2; 50.5% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Olathe city, Kansas · Incorporated city · GEOID 2052575. The survey estimates a population of 145,057 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Olathe is 37.2 years, with a 90% margin of error of 0.6 years. There are 53,072 households (±860). 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	37.2 ±0.6	37.4 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 145,057
Category	Count ± MOE	Share ± MOE (pp)	Kansas	U.S.
Under 18	37,729 ±1,416	26.0% ±1.0 pp	23.8%	22.0%
18–34	29,621 ±1,215	20.4% ±0.8 pp	23.1%	22.8%
35–64	57,757 ±1,595	39.8% ±1.1 pp	36.2%	38.0%
65 and older	19,950 ±1,123	13.8% ±0.8 pp	17.0%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 145,057
Category	Count ± MOE	Share ± MOE (pp)	Kansas	U.S.
Male	71,916 ±970	49.6% ±0.7 pp	50.2%	49.5%
Female	73,141 ±959	50.4% ±0.7 pp	49.8%	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: 145,057
Category	Count ± MOE	Share ± MOE (pp)	Kansas	U.S.
White alone	109,918 ±1,792	75.8% ±1.2 pp	76.0%	61.0%
Black or African American alone	7,900 ±881	5.4% ±0.6 pp	5.3%	12.2%
American Indian and Alaska Native alone	303 ±131	0.2% ±0.1 pp	0.8%	0.9%
Asian alone	6,223 ±857	4.3% ±0.6 pp	2.9%	6.0%
Native Hawaiian and Other Pacific Islander alone	19 ±23 · low precision	0.0% ±0.0 pp · low precision	0.1%	0.2%
Some other race alone	4,576 ±861	3.2% ±0.6 pp	4.2%	7.1%
Two or more races	16,118 ±1,368	11.1% ±0.9 pp	10.6%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 145,057
Category	Count ± MOE	Share ± MOE (pp)	Kansas	U.S.
Not Hispanic or Latino	126,747 ±1,584	87.4% ±1.1 pp	86.4%	80.7%
Hispanic or Latino	18,310 ±1,578	12.6% ±1.1 pp	13.6%	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: 53,072
Category	Count ± MOE	Share ± MOE (pp)	Kansas	U.S.
Married-couple family	31,998 ±749	60.3% ±1.0 pp	49.1%	46.9%
Other family: male householder, no spouse present	2,447 ±376	4.6% ±0.7 pp	4.5%	5.1%
Other family: female householder, no spouse present	4,674 ±564	8.8% ±1.1 pp	9.8%	12.2%
Nonfamily: householder living alone	10,823 ±833	20.4% ±1.5 pp	30.0%	28.7%
Nonfamily: householder not living alone	3,130 ±496	5.9% ±0.9 pp	6.5%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 53,072
Category	Count ± MOE	Share ± MOE (pp)	Kansas	U.S.
Households with people under 18	20,259 ±733	38.2% ±1.2 pp	30.1%	29.5%
Households without people under 18	32,813 ±1,292	61.8% ±2.2 pp	69.9%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 53,072
Category	Count ± MOE	Share ± MOE (pp)	Kansas	U.S.
One-person nonfamily households	10,823 ±833	20.4% ±1.5 pp	30.0%	28.7%
Two-person households	18,842 ±903	35.5% ±1.6 pp	35.2%	33.8%
Three-person households	8,842 ±645	16.7% ±1.2 pp	13.7%	15.3%
Four-person households	8,511 ±628	16.0% ±1.2 pp	11.7%	12.6%
Five-person households	3,769 ±381	7.1% ±0.7 pp	5.7%	5.9%
Six-person households	1,381 ±262	2.6% ±0.5 pp	2.4%	2.2%
Seven or more people	904 ±367	1.7% ±0.7 pp	1.3%	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: 145,057
Category	Count ± MOE	Share ± MOE (pp)	Kansas	U.S.
Native	128,834 ±1,549	88.8% ±1.1 pp	92.6%	85.9%
Foreign born	16,223 ±1,527	11.2% ±1.1 pp	7.4%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 136,162
Category	Count ± MOE	Share ± MOE (pp)	Kansas	U.S.
English only	114,998 ±1,897	84.5% ±1.3 pp	87.9%	77.7%
Spanish	11,663 ±1,495	8.6% ±1.1 pp	8.1%	13.6%
French, Haitian, or Cajun	876 ±362	0.6% ±0.3 pp	0.2%	0.7%
German or other West Germanic	317 ±149	0.2% ±0.1 pp	0.4%	0.5%
Russian, Polish, or other Slavic	507 ±182	0.4% ±0.1 pp	0.2%	0.7%
Other Indo-European	1,997 ±677	1.5% ±0.5 pp	0.6%	2.0%
Korean	176 ±104 · low precision	0.1% ±0.1 pp · low precision	0.1%	0.3%
Chinese, including Mandarin and Cantonese	651 ±219	0.5% ±0.2 pp	0.4%	1.1%
Vietnamese	782 ±304	0.6% ±0.2 pp	0.4%	0.5%
Tagalog, including Filipino	275 ±166 · low precision	0.2% ±0.1 pp · low precision	0.2%	0.6%
Other Asian and Pacific Island	1,346 ±400	1.0% ±0.3 pp	0.8%	1.1%
Arabic	313 ±199 · low precision	0.2% ±0.1 pp · low precision	0.2%	0.5%
Other and unspecified	2,261 ±520	1.7% ±0.4 pp	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: 95,499
Category	Count ± MOE	Share ± MOE (pp)	Kansas	U.S.
Less than high school graduate	5,113 ±604	5.4% ±0.6 pp	8.0%	10.4%
High school graduate or equivalency	15,818 ±1,108	16.6% ±1.1 pp	25.4%	26.0%
Some college, no degree	18,559 ±1,172	19.4% ±1.2 pp	21.8%	19.1%
Associate’s degree	7,770 ±738	8.1% ±0.8 pp	9.1%	8.8%
Bachelor’s degree	30,018 ±1,545	31.4% ±1.6 pp	22.2%	21.6%
Graduate or professional degree	18,221 ±1,278	19.1% ±1.3 pp	13.4%	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: 143,551
Category	Count ± MOE	Share ± MOE (pp)	Kansas	U.S.
Same house	128,003 ±1,509	89.2% ±1.0 pp	85.7%	87.7%
Moved within same county	10,218 ±1,192	7.1% ±0.8 pp	7.5%	6.3%
Moved from a different county in the same state	1,716 ±381	1.2% ±0.3 pp	3.2%	3.1%
Moved from a different state	3,163 ±753	2.2% ±0.5 pp	3.0%	2.3%
Moved from abroad	451 ±182	0.3% ±0.1 pp	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

7.2% of Olathe residents (±0.7 percentage points) had no health insurance coverage when surveyed, compared with 8.8% in Kansas and 8.4% nationally. 95.7% 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	Olathe	Kansas	U.S.	Compared with Kansas
People without health insurance Civilian noninstitutionalized population	7.2% ±0.7 pp	8.8%	8.4%	Lower
Households with a broadband subscription Households	95.7% ±0.9 pp	90.7%	91.0%	Higher
Veterans Civilian population age 18 and older	5.0% ±0.5 pp	6.8%	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 Olathe . 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 Olathe housing and cost context or return to the city profile.