Ottawa, KS Demographics

A map of Ottawa's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	11,041	10,689	87.1%	84.7%
Hispanic	681	761	5.4%	6.0%
Multiracial	517	718	4.1%	5.7%
Black	213	251	1.7%	2.0%
Native American/Other	117	153	0.9%	1.2%
Asian	109	53	0.9%	0.4%

Ottawa, Kansas has an estimated population of 12,678, a less than 1% change from the 12,625 recorded in the 2020 Census. The population is 87.1% White, 5.4% Hispanic, 4.1% Multiracial, 1.7% Black, 0.9% Asian, and 0.9% Native American/Other. This demographic dot map shows the population of Ottawa, with one dot drawn for each person counted by the Census, color-coded by race.

Ottawa has become less racially diverse since the 2020 Census. It is considerably less 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 Ottawa, that probability was 27.6% in 2020 and 23.7% in the most recent ACS estimates.

Ottawa is ranked the 29th 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). Ottawa was ranked the 29th most populous place in the 2020 Census.

Ottawa's White Population

11,041 residents of Ottawa, or 87.1% of the population, identify as White. The share of White residents in Ottawa is considerably higher than in Kansas overall, where 72.7% of the population is White. Ottawa ranks 524th statewide in terms of White residents as a share of the population, out of 740 places.

Since the 2020 Census, Ottawa's White population has grown by an estimated 3.3%. White residents' share of Ottawa's population has increased from 84.7% to 87.1%.

Ottawa is more White than neighboring Princeton (81.8% White), Centropolis (0% White), Rantoul (83.8% White), and Baldwin City (85.9% White). Ottawa is less White than neighboring Pomona (89.3% White).

Ottawa's Black Population

213 residents of Ottawa, or 1.7% of the population, identify as Black. The share of Black residents in Ottawa is slightly lower than in Kansas overall, where 5.2% of the population is Black. Ottawa ranks 93rd statewide in terms of Black residents as a share of the population, out of 740 places.

Since the 2020 Census, Ottawa's Black population has declined by an estimated 15.1%. Black residents' share of Ottawa's population has remained roughly unchanged at 1.7%.

Ottawa is more Black than neighboring Princeton (0% Black), Centropolis (0% Black), Rantoul (0% Black), Pomona (0.6% Black), and Baldwin City (0.9% Black).

Ottawa's Asian Population

109 residents of Ottawa, or 0.9% of the population, identify as Asian. The share of Asian residents in Ottawa is comparable to the share in Kansas overall, where 2.9% of the population is Asian. Ottawa ranks 241st statewide in terms of Asian residents as a share of the population, out of 740 places.

Since the 2020 Census, Ottawa's Asian population has grown by an estimated 105.7%. Asian residents' share of Ottawa's population has increased from 0.4% to 0.9%.

Ottawa is more Asian than neighboring Princeton (0% Asian), Centropolis (0% Asian), Rantoul (0% Asian), and Pomona (0% Asian). Ottawa is less Asian than neighboring Baldwin City (3.9% Asian).

Ottawa's Hispanic Population

681 residents of Ottawa, or 5.4% of the population, identify as Hispanic. The share of Hispanic residents in Ottawa is lower than in Kansas overall, where 13.6% of the population is Hispanic. Ottawa ranks 225th statewide in terms of Hispanic residents as a share of the population, out of 740 places.

Since the 2020 Census, Ottawa's Hispanic population has declined by an estimated 10.5%. Hispanic residents' share of Ottawa's population has decreased from 6.0% to 5.4%.

Ottawa is more Hispanic than neighboring Centropolis (0% Hispanic), and Pomona (1.5% Hispanic). Ottawa is less Hispanic than neighboring Princeton (14.4% Hispanic), Rantoul (9.2% Hispanic), and Baldwin City (7.1% Hispanic).

Ottawa's Native American/Other Population

117 residents of Ottawa, or 0.9% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Ottawa is comparable to the share in Kansas overall, where 0.9% of the population is Native American/Other. Ottawa ranks 233rd statewide in terms of Native American/Other residents as a share of the population, out of 740 places.

Since the 2020 Census, Ottawa's Native American/Other population has declined by an estimated 23.5%. Native American/Other residents' share of Ottawa's population has remained roughly unchanged at 0.9%.

Ottawa is more Native American/Other than neighboring Princeton (0% Native American/Other), Centropolis (0% Native American/Other), Rantoul (0% Native American/Other), and Baldwin City (0.2% Native American/Other). Ottawa is less Native American/Other than neighboring Pomona (2.1% Native American/Other).

Ottawa's Multiracial Population

517 residents of Ottawa, or 4.1% of the population, identify as Multiracial. The share of Multiracial residents in Ottawa is comparable to the share in Kansas overall, where 4.8% of the population is Multiracial. Ottawa ranks 232nd statewide in terms of Multiracial residents as a share of the population, out of 740 places.

Since the 2020 Census, Ottawa's Multiracial population has declined by an estimated 28.0%. Multiracial residents' share of Ottawa's population has decreased from 5.7% to 4.1%.

Ottawa is more Multiracial than neighboring Princeton (3.8% Multiracial), Centropolis (0% Multiracial), and Baldwin City (2% Multiracial). Ottawa is less Multiracial than neighboring Rantoul (6.9% Multiracial), and Pomona (6.4% 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.