Osage County Demographics

A map of Osage County's Population by Race

Osage County, Missouri has an estimated population of 13,402, a less than 1% change from the 13,274 recorded in the 2020 Census. The population is 96.6% White, 1.8% Multiracial, 1.1% Hispanic, 0.3% Black, 0.1% Asian, and 0.1% Native American/Other. This demographic dot map shows the population of Osage County, with one dot drawn for each person counted by the Census, color-coded by race.

Osage has become less racially diverse since the 2020 Census. It is considerably less diverse than Missouri overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Osage County, that probability was 8.5% in 2020 and 6.7% in the most recent ACS estimates.

Osage County is ranked the 73rd most populous county in Missouri, out of 115 counties. Osage County was ranked the 73rd most populous county in the 2020 Census.

Osage County's White Population

12,942 residents of Osage County, or 96.6% of the population, identify as White. The share of White residents in Osage County is significantly higher than in Missouri overall, where 76.3% of the population is White. Osage County ranks 4th statewide in terms of White residents as a share of the population, out of 115 counties.

Since the 2020 Census, Osage County's White population has grown by an estimated 2.0%. White residents' share of Osage County's population has increased from 95.6% to 96.6%.

Osage County is more White than neighboring Maries County (91.7% White), Gasconade County (94.3% White), Callaway County (88% White), Cole County (79.2% White), and Phelps County (84.9% White).

Osage County's Black Population

37 residents of Osage County, or 0.3% of the population, identify as Black. The share of Black residents in Osage County is considerably lower than in Missouri overall, where 10.9% of the population is Black. Osage County ranks 107th statewide in terms of Black residents as a share of the population, out of 115 counties.

Since the 2020 Census, Osage County's Black population has grown by an estimated 54.2%. Black residents' share of Osage County's population has remained roughly unchanged at 0.3%.

Osage County is more Black than neighboring Maries County (0.2% Black). Osage County is less Black than neighboring Gasconade County (0.9% Black), Callaway County (3.7% Black), Cole County (9.7% Black), and Phelps County (2.4% Black).

Osage County's Asian Population

10 residents of Osage County, or 0.1% of the population, identify as Asian. The share of Asian residents in Osage County is comparable to the share in Missouri overall, where 2.1% of the population is Asian. Osage County ranks 112th statewide in terms of Asian residents as a share of the population, out of 115 counties.

Since the 2020 Census, Osage County's Asian population has grown by an estimated 233.3%. Asian residents' share of Osage County's population has remained roughly unchanged at 0.1%.

Osage County is more Asian than neighboring Maries County (0% Asian). Osage County is less Asian than neighboring Cole County (1.4% Asian), and Phelps County (3.7% Asian).

Osage County's Hispanic Population

149 residents of Osage County, or 1.1% of the population, identify as Hispanic. The share of Hispanic residents in Osage County is slightly lower than in Missouri overall, where 5.2% of the population is Hispanic. Osage County ranks 111th statewide in terms of Hispanic residents as a share of the population, out of 115 counties.

Since the 2020 Census, Osage County's Hispanic population has grown by an estimated 19.2%. Hispanic residents' share of Osage County's population has remained roughly unchanged at 1.1%.

Osage County is less Hispanic than neighboring Maries County (2.1% Hispanic), Gasconade County (1.6% Hispanic), Callaway County (2.5% Hispanic), Cole County (3.6% Hispanic), and Phelps County (3.1% Hispanic).

Osage County's Native American/Other Population

17 residents of Osage County, or 0.1% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Osage County is comparable to the share in Missouri overall, where 0.7% of the population is Native American/Other. Osage County ranks 104th statewide in terms of Native American/Other residents as a share of the population, out of 115 counties.

Since the 2020 Census, Osage County's Native American/Other population has declined by an estimated 64.6%. Native American/Other residents' share of Osage County's population has remained roughly unchanged at 0.1%.

Osage County is less Native American/Other than neighboring Maries County (1.3% Native American/Other), Gasconade County (0.5% Native American/Other), Callaway County (0.7% Native American/Other), Cole County (0.9% Native American/Other), and Phelps County (0.9% Native American/Other).

Osage County's Multiracial Population

247 residents of Osage County, or 1.8% of the population, identify as Multiracial. The share of Multiracial residents in Osage County is slightly lower than in Missouri overall, where 4.8% of the population is Multiracial. Osage County ranks 107th statewide in terms of Multiracial residents as a share of the population, out of 115 counties.

Since the 2020 Census, Osage County's Multiracial population has declined by an estimated 36.0%. Multiracial residents' share of Osage County's population has decreased from 2.9% to 1.8%.

Osage County is less Multiracial than neighboring Maries County (4.8% Multiracial), Gasconade County (2.6% Multiracial), Callaway County (4.9% Multiracial), Cole County (5.1% Multiracial), and Phelps County (5% 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.