Simpson County, Mississippi

Simpson County is a county located in the U.S. state of Mississippi. Its western border is formed by the Pearl River, an important transportation route in the 19th century. As of the 2020 census, the population was 25,949. The county seat is Mendenhall. The county is named for Josiah Simpson (1787-1817), a territorial judge who also served as a delegate to Mississippi's Constitutional Convention.

Simpson County is part of the Jackson, MS Metropolitan Statistical Area.

According to the U.S. Census Bureau, the county has a total area of 590 square miles (1,500 km²), of which 589 square miles (1,530 km²) is land and 1.3 square miles (3.4 km²) (0.2%) is water.

• U.S. Highway 49
• Mississippi Highway 13
• Mississippi Highway 28
• Mississippi Highway 43
• Mississippi Highway 149

• Rankin County (north)
• Smith County (east)
• Covington County (southeast)
• Jefferson Davis County (south)
• Lawrence County (southwest)
• Copiah County (west)

As of the 2020 United States census, there were 25,949 people, 9,486 households, and 6,617 families residing in the county.

• Magee
• Mendenhall

• D'Lo

• Braxton

• Harrisville
• Merry Hell
• Pinola
• Sanatorium

• Westville

Simpson County School District is the local school district.

• Dry counties
• National Register of Historic Places listings in Simpson County, Mississippi

• Media related to Simpson County, Mississippi at Wikimedia Commons
• Mississippi Courthouses – Simpson County

1. Jackson metropolitan area, Mississippi
2. Simpson County
3. Magee, Mississippi
4. Sanatorium, Mississippi
5. Mendenhall, Mississippi
6. Braxton, Mississippi
7. Simpson
8. Rankin County torture incident
9. D'Lo, Mississippi
10. National Register of Historic Places listings in Mississippi
11. Smith County, Mississippi
12. U.S. Route 49
13. Westville
14. Westville, Simpson County, Mississippi
15. Copiah–Lincoln Community College
16. Pinola, Mississippi
17. Prentiss Walker
18. Tate County, Mississippi
19. Mississippi Highway 478
20. Jackson–Vicksburg–Brookhaven combined statistical area