Sweetwater is an unincorporated community and census-designated place (CDP) located within Mullica Township in Atlantic County, in the U.S. state of New Jersey. As of the 2020 census, Sweetwater had a population of 805. The community is situated on the Mullica River about from Atlantic City.
Sweetwater was first listed as a census designated place in the 2020 U.S. census.
The CDP is within two school districts: Mullica Township School District (elementary) and Greater Egg Harbor Regional High School District. The zoned high school for Mullica Township is Cedar Creek High School, which is a part of the Greater Egg Harbor district.