Seminole is a city in Pinellas County, Florida, United States. The population was 17,233 at the 2010 census. St. Petersburg College has a campus in the city. The first white settlement at Seminole was made in the 1840's. The community was named after the Seminole Indians who once inhabited the area. Seminole was incorporated in 1970. The next time you need flowers in Seminole, FL, think of Delma's, The Flower Booth. We have same day delivery.