Florida is one of the 50 states that form the United States. The state of Florida has 67 counties. The largest county is Palm Beach county at 2,578 square miles and the smallest county is Union county at 245 square miles. Florida has 7,700 lakes that are greater than 10 acres. It also has approximately 4,500 islands greater than 10 acres; it ranks second in this category in the nation after Alaska.