Mississippian may refer to: Mississippian (geology), a subperiod of the Carboniferous period in the geologic timescale, roughly 360 to 325 million years ago Mississippian period (archaeology), an archaeological culture or period across the Midwest and the Southeastern United States that flourished between 1000 and 1600 Mississippian Railway, a short-line railroad relating to the state of Mississippi
See also Mississippi (disambiguation)