The state of Mississippi has 81 counties in total. Adams County is the oldest (founded in 1799), while Humphreys County is the youngest (established in 1918).

Hinds County is the most populous, with a population of 245,285. Yazoo County has the most land area (1823 km2), while Alcorn County has the smallest (1,036 km2).

Please find all Mississippi counties listed alphabetically below.

• Adams County, MS
• Alcorn County, MS
• Amite County, MS
• Attala County, MS
• Benton County, MS
• Bolivar County, MS
• Calhoun County, MS
• Carroll County, MS
• Chickasaw County, MS
• Choctaw County, MS
• Claiborne County, MS
• Clarke County, MS
• Clay County, MS
• Coahoma County, MS
• Copiah County, MS
• Covington County, MS
• De Soto County, MS
• Forrest County, MS
• Franklin County, MS
• George County, MS
• Greene County, MS
• Grenada County, MS
• Hancock County, MS
• Harrison County, MS
• Holmes County, MS
• Humphreys County, MS
• Issaquena County, MS
• Itawamba County, MS
• Jackson County, MS
• Jasper County, MS
• Jefferson County, MS
• Jefferson Davis County, MS
• Jones County, MS
• Kemper County, MS
• Lafayette County, MS
• Lamar County, MS
• Lauderdale County, MS
• Lawrence County, MS
• Leake County, MS
• Lee County, MS
• Lefiore County, MS
• Lincoln County, MS
• Lowndes County, MS
• Madison County, MS
• Marion County, MS
• Marshall County, MS
• Monroe County, MS
• Montgomery County, MS
• Neshoba County, MS
• Newton County, MS
• Noxubee County, MS
• Oktinneha County, MS
• Panola County, MS
• Pearl River County, MS
• Perry County, MS
• Pike County, MS
• Pontotoc County, MS
• Prentiss County, MS
• Quitman County, MS
• Rankin County, MS
• Scott County, MS
• Sharkey County, MS
• Simpson County, MS
• Smith County, MS
• Stone County, MS
• Sunflower County, MS
• Tallahatchie County, MS
• Tate County, MS
• Tippah County, MS
• Tishomingo County, MS
• Tunica County, MS
• Union County, MS
• Walthall County, MS
• Warren County, MS
• Washington County, MS
• Wayne County, MS
• Webster County, MS
• Wilkinson County, MS
• Winston County, MS
• Yalobusha County, MS
• Yazoo County, MS