Olathe Population

1870–2026

151.8K

2026 projection

7.4% since 2020 (increase)

050K100K150K200K18801900192019401960198020002020

Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for Olathe. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
2026151,803+1,7781.19%
2025150,025+1,3610.92%
2024148,664+1,5811.07%
2023147,083+2,2631.56%
2022144,820+1,8391.29%
2021142,981+1,6911.20%
2020141,290+8230.59%
2019140,467+6790.49%
2018139,788+2,2521.64%
2017137,536+1,6191.19%

Showing 10 of 31 years.

The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.

Growth since 2020, compared

Olathe is growing faster than Johnson County, Kansas, and the U.S.

  • Olathe+6.0%
  • Johnson County+4.2%
  • United States+3.1%
  • Kansas+1.3%

Change from July 1, 2020 to July 1, 2025 population estimates—not annualized growth or site projections.

Source: U.S. Census Bureau. U.S. totals are summed from the 50 states and D.C.; unavailable comparisons are omitted.

Olathe Demographics

37.2median age

Median age

Female37.8 yrs
Male36.6 yrs

Adults

107,328
19,950 seniors (65+) · 19% of adults87,378 other adults

Sex

Female 50.4% · 73,141Male 49.6% · 71,916

Population by age

MaleFemale85+ years, male: 70785+ years, female: 1,31280–84 years, male: 1,07780–84 years, female: 1,25275–79 years, male: 1,39875–79 years, female: 1,81670–74 years, male: 2,56370–74 years, female: 2,71165–69 years, male: 3,45165–69 years, female: 3,66360–64 years, male: 3,60860–64 years, female: 3,45155–59 years, male: 3,75055–59 years, female: 4,19850–54 years, male: 5,30950–54 years, female: 4,66145–49 years, male: 4,79045–49 years, female: 5,12240–44 years, male: 5,51940–44 years, female: 5,68935–39 years, male: 5,41135–39 years, female: 6,24930–34 years, male: 4,78430–34 years, female: 4,62125–29 years, male: 3,86925–29 years, female: 4,51820–24 years, male: 3,92220–24 years, female: 3,66715–19 years, male: 6,09215–19 years, female: 5,38410–14 years, male: 5,34010–14 years, female: 5,2165–9 years, male: 5,7225–9 years, female: 5,3200–4 years, male: 4,6040–4 years, female: 4,29185+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–42K2K4K4K

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 1,451 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

Olathe Income

$114,009median household income

Median household income

$114,009

Half of households earn more, half earn less

Median earnings

$62,840

Typical yearly pay for a worker 25 or older.

Poverty rate

5.6%

About 1 in 18 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

Olathe Marital Status

58% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married58%60%57%
Never married28%30%26%
Divorced9%7%11%
Widowed4%2%6%
Separated1%1%<1%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201

Sources

14 sources

Population

American Community Survey, 2024 5-year

Additional sources