[2] The county is named after the War of 1812 naval hero, Oliver Hazard Perry.

Perry County is part of the Hattiesburg, MS Metropolitan Statistical Area.

At Old Augusta, the outlaw James Copeland was executed by hanging on October 30, 1857.

New Augusta, two miles south of Old Augusta, was made the county seat of Perry County, because it was situated on the Mobile, Jackson & Kansas City Railroad.

[5] As of the 2020 United States census, there were 11,511 people, 4,623 households, and 3,347 families residing in the county.