Olathe, Kansas Population 2020

142,841

Olathe is a city located in Kansas. With a 2020 population of 142,841, it is the 4th largest city in Kansas (after Wichita, Overland Park, and Kansas City) and the 190th largest city in the United States. Olathe is currently growing at a rate of 1.15% annually and its population has increased by 13.48% since the most recent census, which recorded a population of 125,872 in 2010. Spanning over 62 miles, Olathe has a population density of 2,317 people per square mile.

The average household income in Olathe is $100,669 with a poverty rate of 6.37%. The median rental costs in recent years comes to $990 per month, and the median house value is $224,000. The median age in Olathe is 35 years, 34.3 years for males, and 35.6 years for females. For every 100 females there are 97.6 males.

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: 85.29%
  • Black or African American: 6.06%
  • Asian: 3.99%
  • Two or more races: 3.28%
  • Other race: 1.00%
  • Native American: 0.31%
  • Native Hawaiian or Pacific Islander: 0.07%
The current population of Olathe, Kansas is 142,841, based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 139,605.The last official US Census in 2010 recorded the population at 125,872.

Olathe, Kansas Population 2020

Population by Race

Race Population Percentage
White115,97685.29%
Black or African American8,2416.06%
Asian5,4293.99%
Two or More Races4,4553.28%
Some Other Race1,3611.00%
American Indian and Alaska Native4250.31%
Native Hawaiian and Other Pacific Islander990.07%

Olathe Population Pyramid 2020

Olathe Median Age

35


Total

34.3


Male

35.6


Female

Olathe Adults

There are 96,855 adults, (14,239 of whom are seniors) in Olathe.

Olathe Age Dependency

64.6

Age Dependency Ratio

17.2

Old Age Dependency Ratio

47.4

Child Dependency Ratio

Olathe Sex Ratio

Female

68,831

50.62%

Male

67,155

49.38%

Olathe Households and Families

Olathe Renter vs Owner Occupied by Household Type

Olathe Household Types

Type Owner Renter
Married87.3%12.7%
All71.2%28.8%
Female47.3%52.7%
Male46.3%53.7%
Non Family46.1%53.9%

71.2%

Rate of Home Ownership

Type Count Average Size Owned
All47,2652.8571.2
Married28,5823.3987.3
Non Family11,7541.2546.1
Female4,6483.2547.3
Male2,2813.4746.3

3.3

Average Family Size

2.85

Average Household Size

5.2%

Unmarried (Opposite Sex)

0.3%

Unmarried (Same Sex)

Olathe Education

Education Attained Count Percentage
Less Than 9th Grade2,5222.95%
9th to 12th Grade3,0623.58%
High School Graduate13,85716.20%
Some College17,28320.20%
Associates Degree7,3498.59%
Bachelors Degree27,21931.82%
Graduate Degree14,25216.66%

Olathe Educational Attainment by Race

Name Total High School Bachelors
White68,45166,62235,898
Hispanic7,4564,6831,621
Black4,5934,1991,554
Asian3,8023,2681,768
Multiple Races1,2881,219666
Other Race807486124
Native American30126779
Islander232315

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 65.22%.

Name Average Male Female
Overall$47,235$59,511$38,761
Less Than High School$25,489$27,712$19,954
High School Grad$32,278$39,836$25,363
Some College$40,617$47,973$32,615
Bachelors Degree$60,291$79,398$42,374
Graduate Degree$68,150$84,249$56,385

$47,235

Average Earnings

$59,511

Average Male

$38,761

Average Female

Olathe Language

Olathe Language by Age

Olathe Language

85.32% of Olathe residents speak only English, while 14.68% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 8.41% of the population.

Olathe Poverty

Olathe Poverty by Race

Name Total In Poverty Poverty Rate
White101,7123,8933.83%
Hispanic15,2812,85718.70%
Black7,9971,15714.47%
Asian5,4114348.02%
Multiple4,4042816.38%
Other1,34619114.19%
Native4104811.71%

6.37%

Overall Poverty Rate

5.77%

Male Poverty Rate

6.96%

Female Poverty Rate

Poverty in Olathe

The race most likely to be in poverty in Olathe is Hispanic, with 18.70% below the poverty level.

The race least likely to be in poverty in Olathe is White, with 3.83% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.42%. Among those working part-time, it was 8.36%, and for those that did not work, the poverty rate was 12.00%.

Name Poverty
Less Than High School15.40%
High School9.08%
Some College5.55%
Bachelors or Greater1.87%
Name Poverty
Male Unemployed19.88%
Female Unemployed16.98%
Female Employed3.73%
Male Employed2.98%

Olathe Income

Olathe Income by Household Type

Name Median Mean
Households$85,318$100,669
Families$99,253$113,231
Married Families$108,789$124,695
Non Families$43,118$57,397

Olathe Marital Status

Olathe Marital Status

Marriage Rates

58.1%

Overall Marriage Rate

59.5%

Male Marriage Rate

56.7%

Female Marriage Rate

Olathe Married by Age and Sex

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

Olathe Veterans

6,317

Number of Veterans

5,781

Male Veterans

536

Female Veterans

War Veterans
Vietnam2,139
First Gulf War1,646
Second Gulf War1,139
Korea430
World War II186
Age Group Veterans
35 to 542,112
65 to 741,512
75+1,149
55 to 641,054
18 to 34490
Name Veterans % of Total
White5,7316.84%
Black3626.53%
Hispanic2402.60%
Asian962.33%
2 or More935.05%
Indian237.30%
Hawaiian811.76%
Other40.36%

$Olathe Veterans by Education

4.31%

Veteran Poverty Rate

20.83%

Veteran Disability Rate

Olathe Employment Status

74.2%

Labor Force Participation

71.9%

Employment Rate

3.1%

Unemployment Rate

Olathe Place of Birth

Origin of Non-Citizens

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

Origin of Naturalized Citizens

45.37%

Born in Kansas

89.20%

Native Born

10.80%

Foreign Born

6.00%

Non Citizen

Place of Birth

89.20% of Olathe residents were born in the United States, with 45.37% having been born in Kansas. 6.00% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Year Population Growth Annual Growth Rate
2020142,8411,6181.15%
2019141,2231,6181.16%
2018139,6052,1041.53%
2017137,5011,6181.19%
2016135,8831,6041.19%
2015134,2791,4401.08%
2014132,8391,0500.80%
2013131,7891,8441.42%
2012129,9451,6501.29%
2011128,2952,0461.62%
2010126,24933,2873.11%
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%