Demographics · KS
Olathe, KS demographics: 145,057 residents, with a median age of 37.2 years, from the U.S. Census Bureau's American Community Survey 2020–2024 (5-year estimates).
145,057 people live in Olathe, at a median age of 37.2 years (American Community Survey 2020–2024, a 5-year average)
Median age 37.2 years — younger than the U.S. median of 38.9.
ACS 2020–2024 5-year · ACS 5-Year Estimates 2020-2024 (released 2026-01-29)
In Olathe, the largest race group is White (75.8%); 12.6% of residents are Hispanic or Latino (of any race); 11.2% were born outside the United States.
ACS 2020–2024 · B01001 / B01002
The median age in Olathe is 37.2 years (±0.6), younger than the U.S. median of 38.9 years. The population is 49.6% male and 50.4% female. The largest age band is 5 to 17 at 19.9%.
| Age band | People | Share | ± margin |
|---|---|---|---|
| Under 5 | 8,895 | 6.1% | ±667 |
| 5 to 17 | 28,834 | 19.9% | ±1,249 |
| 18 to 24 | 11,829 | 8.2% | ±805 |
| 25 to 34 | 17,792 | 12.3% | ±909 |
| 35 to 44 | 22,868 | 15.8% | ±1,060 |
| 45 to 54 | 19,882 | 13.7% | ±927 |
| 55 to 64 | 15,007 | 10.3% | ±749 |
| 65 to 74 | 12,388 | 8.5% | ±876 |
| 75 and over | 7,562 | 5.2% | ±703 |
Median age by sex: 36.6 (male) · 37.8 (female).
Source: U.S. Census Bureau, ACS 5-Year 2020–2024 (B01001 sex by age, B01002 median age) · place-grain · margins of error at the 90% confidence level · methodology →
ACS 2020–2024 · B02001 / B03003
The largest race group in Olathe is White at 75.8% of the population. Separately, 12.6% of residents are Hispanic or Latino of any race. Race and Hispanic origin are two different questions on the census form, so their shares are reported separately and are not additive.
| Race (alone, or two or more) | People | Share | ± margin |
|---|---|---|---|
| White alone | 109,918 | 75.8% | ±1,792 |
| Black or African American alone | 7,900 | 5.4% | ±881 |
| American Indian & Alaska Native alone | 303 | 0.2% | ±131 |
| Asian alone | 6,223 | 4.3% | ±857 |
| Native Hawaiian & Pacific Islander alone | 19 | 0.0% | ±23 · low precision |
| Some other race alone | 4,576 | 3.2% | ±861 |
| Two or more races | 16,118 | 11.1% | ±1,368 |
| Hispanic or Latino (of any race) | 18,310 | 12.6% | ±1,578 |
Source: U.S. Census Bureau, ACS 5-Year 2020–2024 (B02001 race, B03003 Hispanic or Latino origin) · place-grain · margins of error at the 90% confidence level · methodology →
ACS 2020–2024 · B11001 / B25010
Olathe has 53,072 households. 73.7% are family households and 20.4% are people living alone. The average household holds 2.70 people.
Total households
53,072
ACS 2020–2024 5-yr · B11001
Avg household size
2.70
ACS 2020–2024 5-yr · B25010 · ±0.04
Family households
73.7%
Share of all households · B11001
Living alone
20.4%
Share of all households · B11001
| Household type | Households | ± margin |
|---|---|---|
| Total households | 53,072 | ±860 |
| Family households | 39,119 | ±704 |
| Nonfamily households | 13,953 | ±1,021 |
| Householder living alone | 10,823 | ±833 |
Source: U.S. Census Bureau, ACS 5-Year 2020–2024 (B11001 household type, B25010 average household size) · place-grain · methodology →
ACS 2020–2024 · B05002 / C16001
11.2% of Olathe residents were born outside the United States. 84.5% of residents age 5 and over speak only English at home. The most-spoken non-English language at home is Spanish (8.6%).
| Measure | Value | Source / grain |
|---|---|---|
| Foreign-born share | 11.2% | 16,223 people · B05002 |
| Speak only English at home (age 5+) | 84.5% | C16001 |
| Top non-English language at home | 8.6% | Spanish · 11,663 speakers · C16001 |
Source: U.S. Census Bureau, ACS 5-Year 2020–2024 (B05002 place of birth, C16001 language spoken at home) · place-grain · methodology →
ACS 2020–2024 · B15003
50.5% of adults age 25 and over in Olathe hold a bachelor's degree or higher (the U.S. share is about 35%).
| Measure | Value | Source / grain |
|---|---|---|
| Bachelor's degree or higher (age 25+) | 50.5% | B15003 lines 22–25 over line 1 · place-grain |
Source: U.S. Census Bureau, ACS 5-Year 2020–2024 (B15003 educational attainment, population 25+) · place-grain · methodology →
Sources · provenance
The GEOID for Olathe is 2052575. Every figure on this page is a place-grain American Community Survey 5-Year 2020–2024 estimate (ACS 5-Year Estimates 2020-2024 (released 2026-01-29)) shown with its margin of error. Full per-dataset detail: /sources/.