Kansas Counties by Population (2025)

Top 5 Most Populous Counties

Kansas flag Johnson County

628,529

Kansas flag Sedgwick County

534,671

Kansas flag Shawnee County

178,164

Kansas flag Wyandotte County

164,591

Kansas flag Douglas County

121,645

105 counties

County
2025 Pop. ↓
Area (mi²)
Density
Change (2020)
Johnson County628,5294741,3262.84%
Sedgwick County534,6719975361.88%
Shawnee County178,164544328-0.3%
Wyandotte County164,5911521,083-2.56%
Douglas County121,6454562672.41%
Leavenworth County84,7104631833.35%
Riley County71,080610117-1.3%
Butler County69,3181,430482.86%
Reno County61,3871,25549-0.79%
Saline County52,51672073-3.2%
Crawford County38,00259064-2.43%
Finney County37,1201,30229-3.09%
Miami County36,378576636.29%
Ford County34,0921,09831-0.36%
Geary County34,08338589-7.28%
Cowley County33,6251,12630-2.63%
Harvey County33,17054061-2.4%
Lyon County32,454847381.06%
McPherson County30,14789834-0.12%
Montgomery County29,99864447-4.48%
Ellis County28,75090032-0.68%
Pottawatomie County26,562841324.53%
Franklin County26,457572461.76%
Barton County24,58189527-3.33%
Sumner County22,2841,18219-0.2%
Seward County20,51164032-6.16%
Labette County19,78064531-1.93%
Cherokee County19,11258833-1.02%
Dickinson County18,625847221.37%
Jefferson County18,27353334-0.27%
Osage County16,062706232.04%
Atchison County15,94243137-2.36%
Neosho County15,09457126-5.1%
Bourbon County14,338635230.02%
Jackson County13,520656212.12%
Allen County12,25850025-2.19%
Marion County11,50494412-2.45%
Linn County10,026594174.58%
Nemaha County10,01471714-2.42%
Marshall County9,81590011-2.08%
Pratt County9,10073512-0.47%
Rice County9,04072612-3.72%
Brown County9,00457116-4.94%
Cloud County8,69471512-3.5%
Coffey County8,24962713-1.29%
Wilson County8,03857014-6.34%
Clay County7,93964512-2.24%
Anderson County7,918580141.01%
Thomas County7,7791,0757-1.93%
Doniphan County7,529393190.74%
Wabaunsee County7,15379493.8%
Grant County6,94157512-5.26%
Kingman County6,8508638-7.74%
Russell County6,70388680.37%
Ellsworth County6,3057169-1%
Pawnee County6,0027548-4.06%
Ottawa County5,84272181.97%
Gray County5,80786972.83%
Greenwood County5,7941,1435-3.06%
Sherman County5,7801,0565-1.98%
Mitchell County5,6977028-1.32%
Washington County5,5268956-0.07%
Harper County5,50580170.6%
Norton County5,3408786-2.07%
Morris County5,2026957-3.11%
Stevens County4,8997277-6.56%
Scott County4,7527187-7.53%
Phillips County4,7178865-4.92%
Rooks County4,7148915-3.66%
Republic County4,5757176-1.91%
Barber County3,9651,1343-5.55%
Meade County3,9079784-3.79%
Stafford County3,7857925-6.52%
Kearny County3,7398714-5.63%
Haskell County3,7005786-1.6%
Smith County3,62689541.65%
Osborne County3,3198934-4.9%
Chautauqua County3,2676395-3.51%
Woodson County3,11149860.39%
Lincoln County2,9387194-0.37%
Jewell County2,7719103-5.33%
Decatur County2,7588943-0.04%
Gove County2,7211,07230.26%
Trego County2,7018893-3.64%
Edwards County2,6796224-7.11%
Cheyenne County2,6721,02032.22%
Rush County2,6087184-11.23%
Chase County2,60177331.17%
Logan County2,5891,0732-5.48%
Ness County2,5401,0752-4.98%
Morton County2,5387303-6%
Elk County2,50564440.93%
Hamilton County2,4079972-3.22%
Sheridan County2,3918963-2.21%
Rawlins County2,3431,0692-8.9%
Graham County2,3348993-2.87%
Kiowa County2,3127233-5.82%
Wichita County2,0907193-2.75%
Stanton County1,7696803-15.12%
Clark County1,6639752-15.97%
Comanche County1,5857882-5.54%
Hodgeman County1,5718602-9.56%
Wallace County1,54191421.92%
Lane County1,4997172-4.4%
Greeley County1,0797781-15.31%

Overview of Kansas Counties

There are 105 counties in Kansas.

Of the 105 counties in Kansas, Johnson County is the most populous. Johnson County has a population of 597,555 people, about 20.52% of the state’s total population. Johnson County has grown about 9.51% since the 2010 Census.

Sedgwick County is the second-largest county in Kansas and the only other county with over 500,000 people, with a population of 513,607 people. Sedgwick comprises 17.64% of the state’s population and has grown about 2.90% since the 2010 Census.

Wyandotte County is the third-most populous county in Kansas, with a population of 165,324. Wyandotte County is also home to Kansas City. Wyandotte comprises about 5.68% of Kansas’s population and has grown 4.88% since the 2010 Census.

Kansas Counties with the Fewest Residents

Greeley County is the smallest county in Kansas in terms of population size, home to only 1,227 people. This is only 0.04% of the state’s total population. The population density in Greeley County is only 1.58 persons per square kilometer. While the county already has a very small population, it has declined by 2.46% since the 2010 Census.

The next two counties with the fewest residents are:

  • Wallace County: 1,503 (growth rate of 1.55%, population density of 1.65 persons per square kilometer)
  • Lane County: 1,560 (growth rate of -10.14%, population density of 2.17 persons per square kilometer)

Kansas Counties with Rapid Growth

Only one county in Kansas has experienced double-digit growth since 2010: Pottawatomie County. Pottawatomie County has grown by 11.73% since the Census. Despite this growth, its population is still relatively small at 24,277 people, just 0.83% of the state’s population.

The next three fastest-growing counties in Kansas are:

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)