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.

Hillsborough County is located in the west-central portion of the U.S. state of Florida. In the 2020 census, the population was 1,459,762, making it the fourth-most populous county in Florida and the most populous county outside the Miami metropolitan area. A 2021 estimate has the population of Hillsborough County at 1,512,070 people with a yearly growth rate of 1.34%, which itself is greater than the populations of 12 states according to their 2019 population estimates. Its county seat and largest city is Tampa. Hillsborough County is part of the Tampa–St. Petersburg–Clearwater Metropolitan Statistical Area.