Osceola County is a county rich in history and life.Created in 1887, Osceola County is a 1,506 square mile area that serves as the south/central boundary of the Central Florida greater metropolitan area.The city of Kissimmee, the county seat, is 18 miles due south of Orlando. Osceola's other incorporated city, St. Cloud, is 9 miles east of Kissimmee and approximately 45 miles west of the city of Melbourne on the Atlantic coast.