Olathe

County:: Johnson County
County Seat:: Yes
Area (mi²):: 62.453
State:: Kansas

Olathe is a city located in Johnson County, Kansas. Olathe has a 2025 population of 151,377. It is also the county seat of Johnson County. Olathe is currently growing at a rate of 1.31% annually and its population has increased by 6.92% since the most recent census, which recorded a population of 141,586 in 2020.

The average household income in Olathe is $132,745 with a poverty rate of 5.59%. The median age in Olathe is 36.6 years: 35.7 years for males, and 37.4 years for females.

Demographics

The racial composition of Olathe includes 78.62% White, 4.85% Black or African American, 4.18% Asian, and smaller percentages for other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Black or African American

Asian

Other race

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	112,990	78.62%
Two or more races	13,784	9.59%
Black or African American	6,968	4.85%
Asian	6,004	4.18%
Other race	3,675	2.56%
Native American	282	0.2%
Native Hawaiian or Pacific Islander	17	0.01%

Olathe Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Olathe's average per capita income is $61,881. Household income levels show a median of $112,232. 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	$141,487	-
Families	$126,260	$148,049
Households	$112,232	$132,745
Non Families	$62,911	$83,947

$61,881

Average Income

$112,232

Median Household Income

5.59%

Poverty Rate