- County Human Population: 24,345
Hillsborough County Organizations
Hillsborough County Pet Resource Center
Government Shelter
Humane Society Tampa Bay
Nonprofit Shelter
Hillsborough County is a county located in the west central portion of the U.S. state of Florida. In the 2010 census, the population was 1,229,226, making it the fourth-most populous county in Florida and the most populous county outside the Miami metropolitan area.