Saucier is a census-designated place (CDP) in Harrison County, Mississippi, United States. It is part of the Gulfport–Biloxi, Mississippi Metropolitan Statistical Area. The population was 1,303 at the 2000 census.
Saucier is located at 30°37′30″N 89°8′18″W / 30.625°N 89.13833°W / 30.625; -89.13833 (30.625130, -89.138438).
According to the United States Census Bureau, the CDP has a total area of 7.1 square miles (18.3 km²), of which, 7.0 square miles (18.1 km²) of it is land and 0.1 square miles (0.2 km²) of it (0.85%) is water.