Cornelius Harvey McGillicuddy IV, known popularly as Connie Mack IV, is an American politician and lobbyist. He is the former U.S. Representative for Florida's 14th congressional district, serving from 2005 to 2013. A Republican, he ran for the U.S. Senate in 2012, losing to Democrat Bill Nelson. He is the son of former Republican U.S. Senator Connie Mack III and the great-grandson of baseball manager Connie Mack.

Florida's 14th congressional district is an electoral district for the U.S. Congress and includes western Hillsborough County and southeastern Pinellas County, including most of Tampa. In the 2020 redistricting cycle, the district was redrawn to include almost all areas in both counties which face Tampa Bay, while northeastern Tampa and its neighbouring suburbs are redistricted into the 15th district. The 14th district also includes MacDill Air Force Base and Tampa International Airport.