Orange County, California, USA - 948 square miles.
Hillsborough County, Florida, USA - 1,266 square miles.
Putnam County, Florida has a total area of 827 square miles.
Miami-Dade County, Florida is Florida's third largest county in terms of land area, with 1,946 square miles.
Jackson County in Florida covers approximately 917 square miles.
The largest county in Florida by area is Palm Beach County, at 2,578 square miles.
Duval County in Florida has a total area of 918 square miles.
Seminole County in Florida covers approximately 345 square miles.
Broward County in Florida covers approximately 1,322 square miles.
Palm Beach County is the largest county in Florida and, according the U.S. Census Bureau, measures 2,386 square miles (6,181 km²).
Broward County, FL's area is 1,320 square miles.
Pine Island in Lee County, Florida is approximately 18 miles long and 2 miles wide, totaling around 33 square miles in size.
Jacksonville is 885 square miles.