The state of Kansas has 105 counties in total. Allen County is the oldest (founded in 1855), while Grant County is the youngest (established in 1888).

Johnson County is the most populous, with a population of 559,913. Butler County has the most land area (3,699 km2), while Wyandotte County has the smallest (391 km2).

Please find a list of all Kansas counties sorted alphabetically below.

• Allen County, KS
• Anderson County, KS
• Atchison County, KS
• Barber County, KS
• Barton County, KS
• Bourbon County, KS
• Brown County, KS
• Butler County, KS
• Chase County, KS
• Chautaqua County, KS
• Cherokee County, KS
• Cheyenne County, KS
• Clark County, KS
• Clay County, KS
• Cloud County, KS
• Coffey County, KS
• Comanche County, KS
• Cowley County, KS
• Crawford County, KS
• Decatur County, KS
• Dickinson County, KS
• Doniphan County, KS
• Douglas County, KS
• Edwards County, KS
• Elk County, KS
• Ellis County, KS
• Ellsworth County, KS
• Finney County, KS
• Ford County, KS
• Franklin County, KS
• Geary County, KS
• Gove County, KS
• Graham County, KS
• Grant County, KS
• Gray County, KS
• Greenley County, KS
• Greenwood County, KS
• Hamilton County, KS
• Harper County, KS
• HaRvey County, KS
• Haskell County, KS
• Hodgeman County, KS
• Jackson County, KS
• Jefferson County, KS
• Jewell County, KS
• Johnson County, KS
• Kearny County, KS
• Kingman County, KS
• Kiowa County, KS
• Labette County, KS
• Lane County, KS
• Leavenworth County, KS
• Lincoln County, KS
• Linn County, KS
• Logan County, KS
• Lyon County, KS
• Marion County, KS
• Marshall County, KS
• McPherson County, KS
• Meade County, KS
• Miami County, KS
• Mitchell County, KS
• Montgomery County, KS
• Morris County, KS
• Morton County, KS
• Nemaha County, KS
• Neosho County, KS
• Ness County, KS
• Norton County, KS
• Osage County, KS
• Osborne County, KS
• Ottawa County, KS
• Pawnee County, KS
• Phillips County, KS
• Pottawatomie County, KS
• Pratt County, KS
• Rawlins County, KS
• Reno County, KS
• Republic County, KS
• Rice County, KS
• Riley County, KS
• Rooks County, KS
• Rush County, KS
• Russell County, KS
• Saline County, KS
• Scott County, KS
• Sedgwick County, KS
• Seward County, KS
• Shawnee County, KS
• Sheridan County, KS
• Sherman County, KS
• Smith County, KS
• Stafford County, KS
• Stanton County, KS
• Stevens County, KS
• Sumner County, KS
• Thomas County, KS
• Trego County, KS
• Wabaunsee County, KS
• Wallace County, KS
• Washington County, KS
• Wichita County, KS
• Wilson County, KS
• Woodson County, KS
• Wyandotte County, KS