Half Acre is an unincorporated community in Marengo County, Alabama, United States.

County land records indicate that when the small piece of property was discovered to not be surveyed, it was deeded to "The Devil" and then became known as Hell's Half Acre.

The "Hell's" was dropped from the name at this time and the entire community came to be known simply as Half Acre.

The population of the community began to relocate elsewhere after World War II and today it is home to only the church and a few residences.

[4] Half Acre is situated above Beaver Creek, about 4 miles (6.4 km) east of the Tombigbee River.