St. Johns County is located in the northeastern part of the U.S. state of Florida. As of the 2020 United States census, its population was 273,425. The county seat and most populous incorporated city

Flagler County is situated in the northeastern quadrant of the U.S. state of Florida. The population as of the 2020 census was 115,378. Bunnell is the county seat, and Palm Coast is the largest city.