Olathe, Kansas Population 2023

145,916

Olathe is a city located in Johnson County Kansas. It is also the county seat of Johnson County. With a 2023 population of 145,916, it is the 4th largest city in Kansas and the 201st largest city in the United States.Olathe is currently growing at a rate of 1.07% annually and its population has increased by 3.27% since the most recent census, which recorded a population of 141,290 in 2020. Spanning over 62 miles, Olathe has a population density of 2,367 people per square mile.

The average household income in Olathe is $105,256 with a poverty rate of 7.05%. The median rental costs in recent years comes to - per month, and the median house value is -. The median age in Olathe is 35.2 years, 34.7 years for males, and 35.5 years for females.

In 1900, at the turn of the century and almost 40 years after Olathe’s incorporation, the population stood at 3,451. This kept relatively stagnant over the decades that followed due to the town’s relative obscurity and insignificance.

By the end of the 1940s, Olathe had seen a 6% increase in the population, bringing it up to just shy of 11,000 in 1960. This continued to rise further, seeing an increase of almost 7,000 people by 1970, and an additional 19,000 people by the end of the decade.

These numbers have continued to steadily rise each year by year, and this growth can be mainly attributed to the construction of the Interstate Highway, bringing Olathe’s proximity and access to and from nearby Kansas City ever closer, and making it more accessible for surrounding towns and cities.

While Olathe's population is just over 137,000 in 2019, some estimates peg its population at 300,000 within 20 years (https://fox4kc.com/2018/09/17/olathe-police-finding-officer-recruitment-a-struggle-as-city-grows/)."

The town of Olathe was founded in 1857, getting its name from the Shawnee word for "beautiful.” It was incorporated later in the same year, and despite not being the first city in the county, it was named county seat in October of 1859, due in no small part to its rapid growth.

After being the site of much activity during the American Civil War, Olathe went on to become a major stop on the California Trail, the Oregon Trail and the Santa Fe Trail. Catering to travelers moving along these paths became the primary income source for local businesses. Once the construction of the Transcontinental Railroad saw completion, however, these westward trails lost significance, and Olathe withered into obscurity.

The construction of the Interstate Highway system in the 1950s saw Olathe linked to neighboring Kansas City, resulting in tremendous residential growth and Olathe becoming part of the Kansas City metropolitan area. The 1980s saw even more of a boom in population growth due to tremendous commercial development.

By 2001, Olathe’s population surpassed 100,000, and in 2008 Olathe was ranked the 24th fastest growing city in the United States. Olathe was voted in the same year by CNN and Money and Money magazine as the 11th best city in which to live in the United States.

Olathe Demographics

According to the most recent ACS, the racial composition of Olathe was:

  • White: 83.99%
  • Black or African American: 5.98%
  • Two or more races: 4.2%
  • Asian: 4.15%
  • Other race: 1.48%
  • Native American: 0.19%
  • Native Hawaiian or Pacific Islander: 0.01%
The current population of Olathe, Kansas is 145,916 based on our projections of the latest US Census estimates.The last official US Census in 2020 recorded the population at 141,290.

Olathe, Kansas Population 2023

Population by Race

White

Black or African American

Two or more races

Asian

Other race

Native American

Native Hawaiian or Pacific Islander

Olathe Population by Race

Olathe Population Pyramid 2023

Olathe Median Age

35.2

Total

34.7

Male

35.5

Female

Olathe Adults

There are 99,829 adults, (16,114 of whom are seniors) in Olathe.

Olathe Age Dependency

66.3

Age Dependency Ratio

19.2

Old Age Dependency Ratio

47

Child Dependency Ratio

Olathe Sex Ratio

Female70,75350.82%
Male68,46349.18%

Olathe Population by Age

Olathe Renter vs Owner Occupied by Household Type

3.26

Average Family Size

2.81

Average Household Size

73.0%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Olathe Households and Families

Male

Female

Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Olathe Educational Attainment by Sex (over 25)

Olathe Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

The highest rate of high school graduation is among white people with a rate of 83.67%.

The highest rate of bachelors degrees is among asian people with a rate of 47.19%.

Olathe Educational Attainment by Race

All

Male

Female

$51,911

Average Earnings

$64,401

Average Male

$41,909

Average Female

Olathe Earnings by Educational Attainment

Olathe Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Olathe Language

84.73% of Olathe residents speak only English, while 15.27% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 8.73% of the population.

Olathe Language

Olathe Poverty by Race

rate

7.05%

Overall Poverty Rate

4.31%

Male Poverty Rate

6.57%

Female Poverty Rate

Poverty in Olathe

The race most likely to be in poverty in Olathe is Black, with 19.51% below the poverty level.

The race least likely to be in poverty in Olathe is White, with 4.5% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.27%. Among those working part-time, it was 8.12%, and for those that did not work, the poverty rate was 11.56%.

Olathe Poverty

Olathe Poverty Rate by Education

Olathe Poverty Rate by Employment Status and Sex

Olathe Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

mean

median

Income by Household Type

Olathe Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

58.4%

Overall Marriage Rate

59.8%

Male Marriage Rate

57.1%

Female Marriage Rate

Olathe Married by Age and Sex

male

female

Olathe Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 45-54.

Olathe Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Olathe Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

5,954

Number of Veterans

5,572

Male Veterans

382

Female Veterans

Olathe Veterans by War

Olathe Veterans by Age

count

Olathe Veterans by Race

Olathe Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

3.14%

Veteran Poverty Rate

20.9%

Veteran Disability Rate

Olathe Veterans by Education

LaborForceParticipation

75.1%

Labor Force Participation

72.6%

Employment Rate

3.1%

Unemployment Rate

Olathe Employment by Age

LaborForceParticipation

Olathe Employment by Race

LaborForceParticipation

Olathe Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

46%

Born in Olathe

87.78%

Native Born

10.76%

Foreign Born

5.69%

Non Citizen

5.06%

Naturalized

Place of Birth

87.78% of Olathe residents were born in the United States, with 46% having been born in Kansas. 5.69% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Olathe Place of Birth

Note: data after 2020 is projected based on recent growth

Olathe Population by Year