The Southeastern Planetarium Association (SEPA), is a professional organization for the support of planetaria and staff in Kentucky, West Virginia, Virginia, North Carolina, South Carolina, Tennessee, Georgia, Florida, Louisiana, Mississippi, Alabama, and all U.S. Territories off the southeastern coast of the U.S.

SEPA began with some informal organizational meetings, the first being February of 1970 in Lumberton, North Carolina. The group’s first official conference was in June of 1971 at the Fernbank Science Center in Atlanta, Georgia. The organization was incorporated in May of 1978 through the State of South Carolina.