Look up Mississippian in Wiktionary, the free dictionary.
Mississippian may refer to:
- Mississippian (geology), a subperiod of the Carboniferous period in the geologic timescale, roughly 360 to 325 million years ago
- Mississippian cultures, a network of precontact cultures across the midwest and Eastern Woodlands in North America that flourished from about 800 to 1540 CE
- Mississippian Railway, a short-line railroad
- relating to the state of Mississippi
