Data / Rankings / Median age / Counties in Kansas

Counties in Kansas by median age

Decatur County had the highest median age of 105 counties in 2023, at 52.1 years. Riley County had the lowest, at 25.2 years. The median was 41.3 years and the figure for Kansas was 37.2 years. Source: the U.S. Census Bureau.

Highest52.1Decatur County
Lowest25.2Riley County
Median41.3105 counties
Kansas37.2History

Top 40 counties, 2023

CSVChart (SVG)

Decatur CountyDecatur County: 52.1 years52.1Comanche CountyComanche County: 50.8 years50.8Jewell CountyJewell County: 50.3 years50.3Smith CountySmith County: 50 years50Woodson CountyWoodson County: 49.9 years49.9Elk CountyElk County: 49.6 years49.6Lane CountyLane County: 48.9 years48.9Morris CountyMorris County: 48.7 years48.7Greenwood CountyGreenwood County: 48.4 years48.4Trego CountyTrego County: 47.7 years47.7Wallace CountyWallace County: 47.2 years47.2Rawlins CountyRawlins County: 47 years47Osborne CountyOsborne County: 46.8 years46.8Clark CountyClark County: 46.5 years46.5Graham CountyGraham County: 46.1 years46.1Ness CountyNess County: 46.1 years46.1Republic CountyRepublic County: 46 years46Rooks CountyRooks County: 46 years46Rush CountyRush County: 46 years46Hodgeman CountyHodgeman County: 45.9 years45.9Linn CountyLinn County: 45.5 years45.5Chautauqua CountyChautauqua County: 45.3 years45.3Russell CountyRussell County: 45.3 years45.3Pawnee CountyPawnee County: 44.9 years44.9Phillips CountyPhillips County: 44.6 years44.6Chase CountyChase County: 44.5 years44.5Edwards CountyEdwards County: 44.3 years44.3Lincoln CountyLincoln County: 44.1 years44.1Coffey CountyCoffey County: 44 years44Washington CountyWashington County: 43.9 years43.9Jefferson CountyJefferson County: 43.8 years43.8Ellsworth CountyEllsworth County: 43.7 years43.7Marion CountyMarion County: 43.7 years43.7Morton CountyMorton County: 43.7 years43.7Kingman CountyKingman County: 43.4 years43.4Sheridan CountySheridan County: 43.4 years43.4Mitchell CountyMitchell County: 43.3 years43.3Wabaunsee CountyWabaunsee County: 43.2 years43.2Clay CountyClay County: 43.1 years43.1Osage CountyOsage County: 42.8 years42.8
years. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

RankCounties2023
years		Change on 2022
1Decatur County52.1+1.5
2Comanche County50.8+4
3Jewell County50.3-0.8
4Smith County500
5Woodson County49.9+3.3
6Elk County49.6-0.8
7Lane County48.9+1
8Morris County48.7+2.2
9Greenwood County48.40
10Trego County47.7-0.1
11Wallace County47.2+4.1
12Rawlins County47+0.8
13Osborne County46.8+0.4
14Clark County46.5+0.2
15Graham County46.1-1.1
15Ness County46.1-2.3
17Republic County46-1.5
17Rooks County46+1.1
17Rush County46-0.4
20Hodgeman County45.9-0.1
21Linn County45.5+0.5
22Chautauqua County45.3-0.6
22Russell County45.30
24Pawnee County44.9-1.2
25Phillips County44.6-0.3
26Chase County44.5+0.4
27Edwards County44.3+0.5
28Lincoln County44.1-0.5
29Coffey County44+0.1
30Washington County43.9-1
31Jefferson County43.8+0.6
32Ellsworth County43.7+0.6
32Marion County43.7+0.3
32Morton County43.7+4.2
35Kingman County43.4-0.2
35Sheridan County43.4+0.9
37Mitchell County43.3+1.4
38Wabaunsee County43.2-0.5
39Clay County43.10
40Osage County42.8+0.2
41Barber County42.6-0.2
41Marshall County42.6+0.3
43Ottawa County42.5+0.2
44Wilson County42.3-0.1
45Dickinson County42.1+0.3
45Stafford County42.1-0.1
47Brown County42+0.2
47Cherokee County42-0.4
49Miami County41.8-0.7
50Gove County41.7-0.4
51Labette County41.4+0.8
52Allen County41.3+0.2
52Doniphan County41.3-0.6
54Kiowa County41.2-0.3
54Sumner County41.2-0.8
56Logan County41.1+1.2
57Jackson County41+0.3
58Harper County40.8-0.7
59Reno County40.7+0.2
60Anderson County40.4+0.7
61Montgomery County40.3+0.1
61Neosho County40.30
63Harvey County40.2-0.3
63Norton County40.2-0.2
65Franklin County40.1-0.1
66Nemaha County400
67Greeley County39.9-0.7
68Cheyenne County39.8-3.2
68Saline County39.8-0.1
70Shawnee County39.6+0.2
71Cloud County39.4+0.6
72Scott County39.3+0.6
73McPherson County39.1-0.7
74Rice County390
75Sherman County38.9+0.9
76Barton County38.8-0.4
76Bourbon County38.8+0.7
78Wichita County38.7-4.4
79Butler County38.3+0.1
79Johnson County38.3+0.2
79Leavenworth County38.3+0.3
82Pratt County38.2+0.6
83Cowley County38.10
84Haskell County380
84Stevens County38+1.7
86Kearny County37.5+2.6
86Meade County37.5-0.2
88Gray County36.6+0.5
89Stanton County36.5-3.1
90Atchison County36.4+0.3
90Hamilton County36.4+1
92Pottawatomie County36.2+0.4
93Sedgwick County35.9+0.1
94Thomas County35.3+0.1
95Wyandotte County34.2-0.1
96Crawford County33.8+0.9
97Lyon County33.1+0.2
98Grant County32.90
99Ellis County32.5-0.4
100Finney County32.1+0.2
101Ford County31.9-0.7
102Douglas County31.3+0.6
103Seward County31+0.5
104Geary County27.1+0.5
105Riley County25.2+0.3

Other periods

About this ranking

Age that divides the resident population into two halves of equal size. Spain and the EU: on 1 January. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. American Community Survey 5-year estimates, table B01002: median age, total population. https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b01002.dat. Retrieved 2026-10-08.

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Questions

Which county has the highest median age?

Decatur County, with 52.1 years in 2023, according to the U.S. Census Bureau.

Which county has the lowest median age?

Riley County, with 25.2 years in 2023.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B01002: median age, total population. Retrieved 2026-10-08.

Median age: other rankings

Counties in Kansas: more rankings