Olathe, KS Demographics

A map of Olathe's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	105,029	100,691	72.4%	71.3%
Hispanic	18,310	17,485	12.6%	12.4%
Black	7,688	8,262	5.3%	5.8%
Multiracial	6,420	7,410	4.4%	5.2%
Asian	6,223	6,293	4.3%	4.5%
Native American/Other	1,387	1,149	1.0%	0.8%

Olathe, Kansas has an estimated population of 145,057, a slight increase from the 141,290 recorded in the 2020 Census. The population is 72.4% White, 12.6% Hispanic, 5.3% Black, 4.4% Multiracial, 4.3% Asian, and 1.0% Native American/Other. This demographic dot map shows the population of Olathe, with one dot drawn for each person counted by the Census, color-coded by race.

Olathe has become less racially diverse since the 2020 Census. It is slightly more diverse than Kansas overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Olathe, that probability was 46.9% in 2020 and 45.3% in the most recent ACS estimates.

Olathe is ranked the 4th most populous place in Kansas, out of 740 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). Olathe was ranked the 4th most populous place in the 2020 Census.

Olathe's White Population

105,029 residents of Olathe, or 72.4% of the population, identify as White. The share of White residents in Olathe is comparable to the share in Kansas overall, where 72.7% of the population is White. Olathe ranks 675th statewide in terms of White residents as a share of the population, out of 740 places.

Since the 2020 Census, Olathe's White population has grown by an estimated 4.3%. White residents' share of Olathe's population has increased from 71.3% to 72.4%.

Olathe is less White than neighboring Lenexa (74.3% White), Spring Hill (88% White), Gardner (72.7% White), Overland Park (73.5% White), and Shawnee (77.6% White).

Olathe's Black Population

7,688 residents of Olathe, or 5.3% of the population, identify as Black. The share of Black residents in Olathe is comparable to the share in Kansas overall, where 5.2% of the population is Black. Olathe ranks 25th statewide in terms of Black residents as a share of the population, out of 740 places.

Since the 2020 Census, Olathe's Black population has declined by an estimated 6.9%. Black residents' share of Olathe's population has decreased from 5.8% to 5.3%.

Olathe is more Black than neighboring Spring Hill (0.2% Black), and Overland Park (4.9% Black). Olathe is less Black than neighboring Lenexa (7.2% Black), Gardner (6.5% Black), and Shawnee (6% Black).

Olathe's Asian Population

6,223 residents of Olathe, or 4.3% of the population, identify as Asian. The share of Asian residents in Olathe is comparable to the share in Kansas overall, where 2.9% of the population is Asian. Olathe ranks 12th statewide in terms of Asian residents as a share of the population, out of 740 places.

Since the 2020 Census, Olathe's Asian population has declined by an estimated 1.1%. Asian residents' share of Olathe's population has remained roughly unchanged at 4.3%.

Olathe is more Asian than neighboring Lenexa (4.1% Asian), Spring Hill (1.9% Asian), Gardner (0.9% Asian), and Shawnee (2.8% Asian). Olathe is less Asian than neighboring Overland Park (9% Asian).

Olathe's Hispanic Population

18,310 residents of Olathe, or 12.6% of the population, identify as Hispanic. The share of Hispanic residents in Olathe is comparable to the share in Kansas overall, where 13.6% of the population is Hispanic. Olathe ranks 88th statewide in terms of Hispanic residents as a share of the population, out of 740 places.

Since the 2020 Census, Olathe's Hispanic population has grown by an estimated 4.7%. Hispanic residents' share of Olathe's population has remained roughly unchanged at 12.6%.

Olathe is more Hispanic than neighboring Lenexa (9.5% Hispanic), Spring Hill (5.7% Hispanic), Overland Park (8.5% Hispanic), and Shawnee (9.6% Hispanic). Olathe is less Hispanic than neighboring Gardner (13.8% Hispanic).

Olathe's Native American/Other Population

1,387 residents of Olathe, or 1.0% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Olathe is comparable to the share in Kansas overall, where 0.9% of the population is Native American/Other. Olathe ranks 346th statewide in terms of Native American/Other residents as a share of the population, out of 740 places.

Since the 2020 Census, Olathe's Native American/Other population has grown by an estimated 20.7%. Native American/Other residents' share of Olathe's population has remained roughly unchanged at 1.0%.

Olathe is more Native American/Other than neighboring Lenexa (0.5% Native American/Other), Spring Hill (0.2% Native American/Other), Gardner (0.7% Native American/Other), Overland Park (0.4% Native American/Other), and Shawnee (0.3% Native American/Other).

Olathe's Multiracial Population

6,420 residents of Olathe, or 4.4% of the population, identify as Multiracial. The share of Multiracial residents in Olathe is comparable to the share in Kansas overall, where 4.8% of the population is Multiracial. Olathe ranks 274th statewide in terms of Multiracial residents as a share of the population, out of 740 places.

Since the 2020 Census, Olathe's Multiracial population has declined by an estimated 13.4%. Multiracial residents' share of Olathe's population has decreased from 5.2% to 4.4%.

Olathe is more Multiracial than neighboring Spring Hill (4% Multiracial), Overland Park (3.7% Multiracial), and Shawnee (3.7% Multiracial). Olathe is less Multiracial than neighboring Lenexa (4.5% Multiracial), and Gardner (5.3% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.