Sallis is a town in Attala County, Mississippi, United States. The population was 114 at the 2000 census. Sallis is the birthplace of the late David Barksdale, who, with Larry Hoover at one point ran the Black Gangster Disciple Nation.
Sallis is located at 33°1′14″N 89°45′52″W / 33.02056°N 89.76444°W / 33.02056; -89.76444 (33.020605, -89.764555).
According to the United States Census Bureau, the town has a total area of 0.4 square miles (1.1 km²), all of it land.