Olathe, Kansas Population 2021

142,119
map placeholder

Olathe is a city located in Johnson County Kansas. It is also the county seat of Johnson County. With a 2020 population of 142,119, it is the 4th largest city in Kansas (after Wichita, Overland Park, and Kansas City) and the 191st largest city in the United States . Olathe is currently growing at a rate of 0.56% annually and its population has increased by 12.91% since the most recent census, which recorded a population of 125,872 in 2010. Olathe reached it's highest population of 142,119 in 2021. Spanning over 62 miles, Olathe has a population density of 2,306 people per square mile.

The average household income in Olathe is $105,256 with a poverty rate of 5.83%. The median rental costs in recent years comes to $1,019 per month, and the median house value is $238,100. The median age in Olathe is 35.4 years, 34.6 years for males, and 36 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: 84.90%
  • Black or African American: 6.25%
  • Asian: 4.09%
  • Two or more races: 3.43%
  • Other race: 0.99%
  • Native American: 0.27%
  • Native Hawaiian or Pacific Islander: 0.08%
The current population of Olathe, Kansas is 142,119 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 139,758.The last official US Census in 2010 recorded the population at 125,872.

Olathe, Kansas Population 2021

Population by Race

Race Population Percentage
White116,83184.90%
Black or African American8,5966.25%
Asian5,6324.09%
Two or More Races4,7143.43%
Some Other Race1,3680.99%
American Indian and Alaska Native3690.27%
Native Hawaiian and Other Pacific Islander1080.08%
Loading...

Olathe Population by Race

Olathe Population Pyramid $2021

Loading...

Olathe Median Age

35.4


Total

34.6


Male

36


Female

Olathe Adults

There are 98,448 adults, (15,166 of whom are seniors) in Olathe.

Olathe Age Dependency

65.2

Age Dependency Ratio

18.2

Old Age Dependency Ratio

47

Child Dependency Ratio

Olathe Sex Ratio

Female

69,964

50.84%

Male

67,654

49.16%

Olathe Population by Age

Olathe Renter vs Owner Occupied by Household Type

Loading...

Olathe Household Types

Type Owner Renter
Married87.8%12.2%
All72.3%27.7%
Male57%43%
Non Family47.8%52.2%
Female47.2%52.8%

72.3%

Rate of Home Ownership

Olathe Households and Families

Type Count Average Size Owned
All48,2272.8272.3
Married28,9873.3687.8
Non Family12,3511.2347.8
Female4,5203.2647.2
Male2,3693.7157

3.28

Average Family Size

2.82

Average Household Size

Loading...

Olathe Households by Type

Loading...
Education Attained Count Percentage
Less Than 9th Grade2,4022.75%
9th to 12th Grade3,1273.58%
High School Graduate14,22116.27%
Some College16,95319.40%
Associates Degree7,2508.30%
Bachelors Degree28,29432.37%
Graduate Degree15,15317.34%
Loading...

Olathe Educational Attainment by Sex (over 25)

Olathe Educational Attainment by Race

Loading...
Race Total High School Bachelors
White69,14767,23837,140
Hispanic8,1685,5261,833
Black4,8404,4161,784
Asian3,8063,2911,904
2+ Races1,5881,519843
Other Race918631248
Native American24722771
Islander212117

The highest rate of high school graduation is among islander people with a rate of 100.00%.

The highest rate of bachelors degrees is among islander people with a rate of 80.95%.

Olathe Educational Attainment by Race

Loading...
Name Average Male Female
Overall$50,484$62,201$41,051
Less Than 9th Grade$27,333$31,424$20,807
High School Graduate$34,031$41,955$26,827
Some College$43,196$52,647$35,192
Bachelors Degree$62,267$81,410$45,051
Graduate Degree$69,251$84,468$59,409

$50,484

Average Earnings

$62,201

Average Male

$41,051

Average Female

Olathe Earnings by Educational Attainment

Olathe Language by Age

Loading...

Olathe Language

85.24% of Olathe residents speak only English, while 14.76% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 8.38% of the population.

Olathe Language

Olathe Poverty by Race

Loading...
Name Total In Poverty Poverty Rate
White101,9643,5843.51%
Hispanic15,8682,47515.60%
Black8,3661,32415.83%
Asian5,6023355.98%
Other1,34130923.04%
Multiple4,6662465.27%
Native359298.08%

5.83%

Overall Poverty Rate

4.78%

Male Poverty Rate

6.86%

Female Poverty Rate

Poverty in Olathe

The race most likely to be in poverty in Olathe is Other, with 23.04% below the poverty level.

The race least likely to be in poverty in Olathe is White, with 3.51% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.29%. Among those working part-time, it was 7.94%, and for those that did not work, the poverty rate was 11.41%.

Olathe Poverty

Loading...
Name Poverty
Less Than 9th Grade14.90%
High School8.35%
Some College5.33%
Bachelors or Greater1.70%

Olathe Poverty Rate by Education

Loading...
Rate Poverty
Female Unemployed18.28%
Male Unemployed12.61%
Female Employed3.87%
Male Employed2.35%

Olathe Poverty Rate by Employment Status and Sex

Olathe Income by Household Type

Loading...
Name Median Mean
Households$90,435$105,256
Families$103,726$118,762
Married Families$114,471$130,232
Non Families$47,156$60,474
Loading...

Income by Household Type

Olathe Marital Status

Loading...

Marriage Rates

57.9%

Overall Marriage Rate

59.0%

Male Marriage Rate

56.8%

Female Marriage Rate

Olathe Married by Age and Sex

Loading...

Olathe Marriage

The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 35-44.

Olathe Marital Status by Race

Loading...

Olathe Marital Status

Loading...

6,297

Number of Veterans

5,840

Male Veterans

457

Female Veterans

War Veterans
Vietnam2,013
First Gulf War1,776
Second Gulf War1,249
Korea412
World War II151

Olathe Veterans by War

Loading...
Age Group Veterans
35 to 542,153
65 to 741,554
75+1,162
55 to 64953
18 to 34475

Olathe Veterans by Age

Loading...
Name Veterans % of Total
White5,7206.74%
Black3145.55%
Hispanic2862.93%
Asian1142.74%
2+ Races723.48%
Other Race504.37%
Native American238.58%
Islander45.26%

Olathe Veterans by Race

Olathe Veterans by Education

Loading...

3.40%

Veteran Poverty Rate

22.26%

Veteran Disability Rate

Olathe Veterans by Education

Loading...

74.4%

Labor Force Participation

72.1%

Employment Rate

2.8%

Unemployment Rate

Olathe Employment by Age

Loading...

Olathe Employment by Race

Loading...

Olathe Employment by Education

Origin of Non-Citizens

Loading...

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

Origin of Naturalized Citizens

Loading...

45.88%

Born in Olathe

89.36%

Native Born

10.64%

Foreign Born

5.73%

Non Citizen

4.91%

Naturalized

Place of Birth

89.36% of Olathe residents were born in the United States, with 45.88% having been born in Kansas. 5.73% 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

Year Population Growth Annual Growth Rate
2021142,1197870.56%
2020141,3327870.56%
2019140,5457870.56%
2018139,7582,2321.62%
2017137,5261,5981.18%
2016135,9281,6301.21%
2015134,2981,4591.10%
2014132,8391,0410.79%
2013131,7981,8351.41%
2012129,9631,6381.28%
2011128,3252,0561.63%
2010126,26933,3073.11%
200092,96229,6103.91%
199063,35226,0945.45%
198037,25819,3417.60%
197017,9176,9305.01%
196010,9875,3946.99%
19505,5931,6143.46%
19403,9793230.85%
19303,6563881.13%
19203,268-4-0.01%
19103,272-179-0.53%
19003,4511570.47%
18903,2940.00%

Olathe Population by Year