The U.S. Courthouse and Post Office in Aberdeen, Mississippi was built in 1885. Also known as Old Federal Building, it served historically as a courthouse and as a post office. It was listed on the National Register of Historic Places in 1976.It is a red brick and gray stone 2-1/2-story building in the "Victorian Romanesque style embellished wi±h Gothic and Classical details." It has terra cotta decorations.William A. Freret replaced Mifflin E. Bell as architect during the project.