Seminole County is a county located in the central portion of the U.S. state of Florida. As of the 2020 census, the population was 470,856, making it the 13th-most populated county in Florida. Its county seat and largest city is Sanford. Seminole County is part of the Orlando-Kissimmee-Sanford, Florida Metropolitan Statistical Area.

Orange County is a county located in Central Florida, and as of the 2020 census, its population was 1,429,908 making it Florida's fifth-most populous county. Its county seat is Orlando, the core of the Orlando metropolitan area, which had a population of 2.67 million in 2020.