Valparaiso is a city in Okaloosa County, Florida, in the United States. As of the 2000 census, the city population was 6,408. According to the U.S. Census Bureau's 2004 estimates, the city had a population of 6,336. Valparaiso apartments for rent comparison page shows most up to date rent information on Valparaiso apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.