• county
  • FIPS 20139
  • Largest town: Osage City

Osage County, Kansas

Osage County had 15,737 residents in the Census Vintage 2024 estimate, on 705.5 square miles of land. It ranks 32nd of 105 in Kansas by population and 68th by land area.

Population
15,737
#32 of 105 in Kansas · #2,054 in US
Area
705.5 sq mi
#68 of 105 in Kansas · #1,311 in US
Density
22 / sq mi
#33 of 105 in Kansas · #2,153 in US
Median household income
$69,666
#19 of 105 in Kansas · #1,030 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Osage County within Kansas. Pin: Topeka.

Measure from here

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Osage County population, land area and income

Osage County had 15,737 residents in the Census Vintage 2024 estimate, on 705.5 square miles of land. It ranks 32nd of 105 in Kansas by population and 68th by land area. That works out to 22.3 people per square mile, below the US average of 96.3, and below the national county median.

The median county-equivalent in Kansas has 6,946 residents, so Osage County is 2.3 times that size.

Its SAIPE 2023 median household income of $69,666 is above the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

15,737

3144th1st

2054th of 3,144 (US)

Land area

706 sq mi

3144th1st

1311th of 3,144 (US)

Density

22.3 / sq mi

3144th1st

2153rd of 3,144 (US)

Median household income

$69,666

3143rd1st

1030th of 3,143 (US)

Rank within Kansas (105)

Population

15,737

105th1st

32nd of 105 (KS)

Land area

706 sq mi

105th1st

68th of 105 (KS)

Density

22.3 / sq mi

105th1st

33rd of 105 (KS)

Median household income

$69,666

105th1st

19th of 105 (KS)

How Osage County's population changed since 2020

Osage County lost 3 residents between the July 2020 and July 2024 estimates, a drop of 0.0%. That ranks 32nd of 105 in Kansas for growth. The median Kansas county changed by -1.0%, and the state as a whole by +1.1%.

Since the April 2020 estimates base, Osage County recorded 629 births and 962 deaths, a natural change of -333. Net international migration added +0 and net domestic migration, people moving to or from other US counties, came to +308. The largest single component was natural change, which removed 333 people.

15.7k202015.8k202115.7k202215.8k202315.7k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
629
Deaths
962
Net international migration
+0
Net domestic migration
+308
Change, July 2023 to July 2024
-61

Where Osage County is

The Census internal point of Osage County is at 38.650200, -95.708300. It sits in UTM zone 15N. The map shades Kansas's 105 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Osage County outlined. Dots are towns of 1,000+ people with residents in it.

Harper County: -1.0%Phillips County: -4.6%Seward County: -2.7%Grant County: -3.1%Pawnee County: -3.8%Haskell County: -4.5%Ness County: -2.3%Logan County: -1.8%Wichita County: -3.6%Greenwood County: -1.7%Stanton County: -0.7%Edwards County: -5.3%Gray County: +1.6%Franklin County: +1.0%Saline County: -1.5%Allen County: -0.9%Lyon County: +1.3%Cloud County: -3.3%Brown County: -3.6%Rice County: -1.1%Lincoln County: -0.6%Osborne County: -4.0%Rooks County: -2.8%Russell County: -0.8%Jefferson County: +0.0%Jewell County: -1.0%Lane County: -5.6%Sheridan County: -1.9%Gove County: -2.1%Trego County: -1.1%Montgomery County: -3.0%Sumner County: +0.1%Graham County: -1.5%Marion County: -1.0%Washington County: +0.8%Stevens County: -4.0%Kiowa County: -0.7%Mitchell County: +0.4%Cheyenne County: +1.3%Ellis County: +0.2%Rush County: -4.6%Scott County: -4.3%Comanche County: +0.7%Wallace County: -2.6%Nemaha County: -2.0%Linn County: +2.6%Ford County: -0.4%Dickinson County: +1.4%Ellsworth County: -0.9%Labette County: -2.3%Cowley County: -1.0%Neosho County: -2.2%Wilson County: -2.2%Thomas County: -1.7%Greeley County: -9.6%Osage County: -0.0%Finney County: +0.1%Kearny County: -3.8%Kingman County: -6.4%Republic County: -1.3%Ottawa County: +2.1%Smith County: -0.5%Crawford County: -0.1%Elk County: -1.5%Miami County: +4.4%Hodgeman County: -3.7%Morris County: -1.7%Morton County: -8.1%Harvey County: -1.0%Meade County: -4.2%Sedgwick County: +2.1%Geary County: -3.6%Woodson County: +0.4%Bourbon County: +0.6%Chase County: -2.6%Pratt County: -0.0%Reno County: -0.8%Chautauqua County: -1.2%Norton County: -2.1%Marshall County: -0.7%Doniphan County: +1.4%Cherokee County: -0.9%Barton County: -2.3%Riley County: +0.8%Butler County: +2.6%Stafford County: -3.7%Anderson County: +0.9%Sherman County: -1.8%Rawlins County: -5.5%Pottawatomie County: +5.7%McPherson County: +0.5%Coffey County: -0.7%Hamilton County: +0.0%Atchison County: -0.5%Shawnee County: -0.4%Leavenworth County: +3.3%Jackson County: +2.2%Clark County: -5.3%Douglas County: +2.7%Clay County: -1.9%Barber County: -3.2%Johnson County: +3.5%Wabaunsee County: +3.2%Decatur County: -1.1%Wyandotte County: +0.3%
Change 2020 to 2024
  1. < -3.6%
  2. < -1.7%
  3. < -0.7%
  4. < +0.6%
  5. ≥ +0.6%
no data

Orange pin: Osage County internal point. Dark pin: Topeka.

Internal point

Decimal
38.650200, -95.708300
DMS
38°39'0.72"N 95°42'29.88"W
UTM
15N 264313.7E 4281440.5N
Geohash
9yggyh53d
Plus code
86C6M72R+3M

Towns in Osage County

3 incorporated places of 1,000+ people have residents in Osage County, 5,142 people together, or 33% of the county. Each figure counts only the part of the town inside Osage County; towns marked "part" extend into another county. The largest is Osage City with 2,799.

  1. 01Osage City2,799
  2. 02Carbondale1,306
  3. 03Lyndon1,037
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Osage County

The Census 2024 county adjacency file lists 6 neighbors for Osage County. The most populous is Shawnee County, KS, with 177,942 residents. Distances run between Census internal points in a straight line.

Distance to Topeka and the nearest big city

Topeka is 27.5 miles N of Osage County's internal point in a straight line. The nearest place of 100,000 or more is Topeka, KS (population 125,467), 26.6 miles away. The nearest place of 10,000 or more is Ottawa, KS (population 12,733), 24.3 miles away.

Osage County FIPS code

The FIPS code of Osage County is 20139: state code 20 for Kansas plus county code 139. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $69,666.

Questions people ask

What is the population of Osage County, Kansas?

The Census Vintage 2024 estimate for July 1, 2024 is 15,737. That is down 3 people (0.0%) from the July 2020 estimate of 15,740.

What is the FIPS code of Osage County?

20139. The first two digits (20) are Kansas; the last three (139) identify the county.

What is the largest town in Osage County?

Osage City, with 2,799 residents inside Osage County in 2024.

Which counties border Osage County?

6 county-equivalents border it in the Census 2024 adjacency file: Shawnee County, KS; Douglas County, KS; Lyon County, KS; Franklin County, KS; Coffey County, KS; Wabaunsee County, KS.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.