Olathe Flag

Olathe

County:
Johnson County
County Seat:
Yes
Area (mi²):
64.669
State:
Kansas

Olathe is a city located in Johnson County, Kansas. Olathe has a 2026 population of 152,772. It is also the county seat of Johnson County. Olathe is currently growing at a rate of 1.24% annually and its population has increased by 7.92% since the most recent census, which recorded a population of 141,560 in 2020.

The median household income in Olathe is $114,009 with a poverty rate of 5.59%. The median age in Olathe is 37.2 years: 36.6 years for males, and 37.8 years for females. For every 100 females there are 98.3 males.

152.8K
Total Population
2,362
Density (mi²)
1.9K 1.24%
Growth

Olathe Population

Olathe Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
2026152,7721,8691.24%
2025150,9031,8681.25%
2024149,0351,8901.28%
2023147,1452,4041.66%
2022144,7411,7831.25%
2021142,9581,6681.18%
2020141,5609120.65%
2019140,6486990.5%
2018139,9492,2711.65%
2017137,6781,6381.2%
2016136,0401,6561.23%
2015134,3841,4801.11%
2014132,9041,0570.8%
2013131,8471,8561.43%
2012129,9911,6591.29%
2011128,3322,0791.65%
2010126,2533810.3%
200092,96229,61046.74%
199063,35226,09470.04%
198037,25819,341107.95%
197017,9176,93063.07%
196010,9875,39496.44%
19505,5931,61440.56%
19403,9793238.83%
19303,65638811.87%
19203,268-4-0.12%
19103,272-179-5.19%
19003,4511574.77%
18903,29400%

Median Age

Overall: 37.2 years
Female: 37.8 years
Male: 36.6 years

Olathe Adults

There are 107,328 adults, (19,950 of whom are seniors) in Olathe.

Sex Ratio

Female: 73,141 (50.4%)
Male: 71,916 (49.6%)

Demographics

The racial composition of Olathe includes 75.78% White, 5.45% Black or African American, 4.29% Asian, 3.15% other race, and smaller percentages for Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White109,91875.78%
Two or more races16,11811.11%
Black or African American7,9005.45%
Asian6,2234.29%
Other race4,5763.15%
Native American3030.21%
Native Hawaiian or Pacific Islander190.01%
Race
Population ↓
Percentage (of total)
Two or more races9,6986.69%
White4,8893.37%
Other race3,3902.34%
Black or African American2120.15%
Native American1210.08%
Race
Population ↓
Percentage (of total)
White105,02972.41%
Black or African American7,6885.3%
Two or more races6,4204.43%
Asian6,2234.29%
Other race1,1860.82%
Native American1820.13%
Native Hawaiian or Pacific Islander190.01%

Olathe Marital Status

Economics and Income Statistics

Olathe 's average per capita income is $62,840. Household income levels show a median of $114,009. The poverty rate stands at 5.59%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median ↓
Mean
Married Families$145,231$169,439
Families$129,581$153,365
Households$114,009$137,006
Non Families$63,227$85,609

$62,840

Average Income

$114,009

Median Household Income

5.59%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)