Rayville is a town in, the parish seat of, and the largest community in Richland Parish in northeastern Louisiana, United States. The population was 4,234 at the 2000 census. It is also home of Palmetto Addiction Recovery Center
City Hall in Rayville, located next to the U.S. Post Office across from U.S. Highway 80, is named for former Mayor Joe Kalil (1922–1996).
Rayville is located at 32°28′25″N 91°45′27″W / 32.47361°N 91.7575°W / 32.47361; -91.7575 (32.473580, -91.757387).