Gautier is a city in Jackson County, Mississippi, United States, along the Gulf of Mexico west of Pascagoula. It is part of the Pascagoula Metropolitan Statistical Area. The population was 18,572 at the 2010 census, up from 11,681 at the 2000 census. In 2002, Gautier had annexed land more than doubling its area.

Jackson County is a county located in the U.S. state of Mississippi. As of the 2020 census, the population was 143,252, making it the fifth-most populous county in Mississippi. Its county seat is Pascagoula. The county was named for Andrew Jackson, general in the United States Army and afterward President of the United States.