Ottawa County Demographics

A map of Ottawa County's Population by Race

Ottawa County, Kansas has an estimated population of 5,819, a slight increase from the 5,735 recorded in the 2020 Census. The population is 92.9% White, 3.3% Hispanic, 2.8% Multiracial, 0.5% Native American/Other, 0.4% Black, and 0.1% Asian. This demographic dot map shows the population of Ottawa County, 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 County, that probability was 15.4% in 2020 and 13.6% in the most recent ACS estimates.

Ottawa County is ranked the 59th most populous county in Kansas, out of 105 counties. Ottawa County was ranked the 60th most populous county in the 2020 Census.

Ottawa County's White Population

5,404 residents of Ottawa County, or 92.9% of the population, identify as White. The share of White residents in Ottawa County is significantly higher than in Kansas overall, where 72.7% of the population is White. Ottawa County ranks 18th statewide in terms of White residents as a share of the population, out of 105 counties.

Since the 2020 Census, Ottawa County's White population has grown by an estimated 2.6%. White residents' share of Ottawa County's population has increased from 91.9% to 92.9%.

Ottawa County is more White than neighboring Cloud County (89.3% White), Saline County (77.8% White), Clay County (90% White), Dickinson County (88.4% White), and Lincoln County (91.1% White).

Ottawa County's Black Population

23 residents of Ottawa County, or 0.4% of the population, identify as Black. The share of Black residents in Ottawa County is slightly lower than in Kansas overall, where 5.2% of the population is Black. Ottawa County ranks 62nd statewide in terms of Black residents as a share of the population, out of 105 counties.

Since the 2020 Census, Ottawa County's Black population has declined by an estimated 23.3%. Black residents' share of Ottawa County's population has remained roughly unchanged at 0.4%.

Ottawa County is more Black than neighboring Dickinson County (0.1% Black), and Lincoln County (0.1% Black). Ottawa County is less Black than neighboring Cloud County (0.8% Black), Saline County (3.4% Black), and Clay County (2.4% Black).

Ottawa County's Asian Population

3 residents of Ottawa County, or 0.1% of the population, identify as Asian. The share of Asian residents in Ottawa County is slightly lower than in Kansas overall, where 2.9% of the population is Asian. Ottawa County ranks 91st statewide in terms of Asian residents as a share of the population, out of 105 counties.

Since the 2020 Census, Ottawa County's Asian population has declined by an estimated 70.0%. Asian residents' share of Ottawa County's population has remained roughly unchanged at 0.1%.

Ottawa County is less Asian than neighboring Saline County (1.7% Asian), Clay County (0.6% Asian), Dickinson County (0.2% Asian), and Lincoln County (0.6% Asian).

Ottawa County's Hispanic Population

194 residents of Ottawa County, or 3.3% of the population, identify as Hispanic. The share of Hispanic residents in Ottawa County is considerably lower than in Kansas overall, where 13.6% of the population is Hispanic. Ottawa County ranks 95th statewide in terms of Hispanic residents as a share of the population, out of 105 counties.

Since the 2020 Census, Ottawa County's Hispanic population has grown by an estimated 34.7%. Hispanic residents' share of Ottawa County's population has increased from 2.5% to 3.3%.

Ottawa County is less Hispanic than neighboring Cloud County (3.9% Hispanic), Saline County (12.8% Hispanic), Clay County (3.5% Hispanic), Dickinson County (5.7% Hispanic), and Lincoln County (4.6% Hispanic).

Ottawa County's Native American/Other Population

30 residents of Ottawa County, or 0.5% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Ottawa County is comparable to the share in Kansas overall, where 0.9% of the population is Native American/Other. Ottawa County ranks 62nd statewide in terms of Native American/Other residents as a share of the population, out of 105 counties.

Since the 2020 Census, Ottawa County's Native American/Other population has declined by an estimated 18.9%. Native American/Other residents' share of Ottawa County's population has remained roughly unchanged at 0.5%.

Ottawa County is more Native American/Other than neighboring Saline County (0.2% Native American/Other), and Lincoln County (0.3% Native American/Other). Ottawa County is less Native American/Other than neighboring Cloud County (1.7% Native American/Other).

Ottawa County's Multiracial Population

165 residents of Ottawa County, or 2.8% of the population, identify as Multiracial. The share of Multiracial residents in Ottawa County is comparable to the share in Kansas overall, where 4.8% of the population is Multiracial. Ottawa County ranks 38th statewide in terms of Multiracial residents as a share of the population, out of 105 counties.

Since the 2020 Census, Ottawa County's Multiracial population has declined by an estimated 32.9%. Multiracial residents' share of Ottawa County's population has decreased from 4.3% to 2.8%.

Ottawa County is less Multiracial than neighboring Cloud County (4.2% Multiracial), Saline County (4.1% Multiracial), Clay County (3% Multiracial), Dickinson County (5.1% Multiracial), and Lincoln County (3.4% 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.