Gallman is an unincorporated community in Copiah County, Mississippi, United States. Gallman is located along Interstate 55 and U.S. Route 51 4.25 miles (6.84 km) south-southwest of Crystal Springs. Gallman has a post office with ZIP code 39077, which opened on November 8, 1872.
Gallman is home to Copiah Academy, a private school in the Mississippi Aasociation of Independent Schools. Copiah Academy services K3-12th grades and is a Christian based college preparatory school.