Congaree National Park Act of 2003 - Establishes Congaree National Park, which shall be composed of the Congaree Swamp National Monument and approximately 4,576 acres of adjacent land in South Carolina.
Authorizes the Secretary to acquire land for inclusion in the Park by donation, purchase from a willing seller, transfer, or exchange. Limits the Park's total area to 30,000 acres.
Requires the Secretary to: (1) submit a general management plan for the Park to specified congressional committees; and (2) permit sport fishing within the Park.
Designates the Congaree Swamp National Monument Wilderness as the Congaree National Park Wilderness.