Osage County Population

1860–2026

15,640

2026 projection

0.7% since 2020 (decrease)

05K10K15K20K25K30K186018801900192019401960198020002020

Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for Osage County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202615,640-530.34%
202515,693-530.34%
202415,746-680.43%
202315,814+1170.75%
202215,697-650.41%
202115,762+150.10%
202015,747-1591.00%
201915,906-150.09%
201815,921+790.50%
201715,842+60.04%

Showing 10 of 31 years.

Osage County Demographics

42.9median age

Median age

Female44.1 yrs
Male42.1 yrs

Adults

12,119
3,288 seniors (65+) · 27% of adults8,831 other adults

Sex

Female 49.1% · 7,724Male 50.9% · 8,020

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 157 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

Osage County Income

$74,467median household income

Median household income

$74,467

Half of households earn more, half earn less

Median earnings

$48,180

Typical yearly pay for a worker 25 or older.

Poverty rate

9.7%

About 1 in 10 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

Osage County Marital Status

53% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married53%53%54%
Never married23%28%18%
Divorced16%15%18%
Widowed6%4%9%
Separated1%1%1%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201