Oviedo, Florida is located in Seminole County. It is a city in this county with a population of around 40,000 people as of 2020. Seminole County is part of the Orlando–Kissimmee–Sanford Metropolitan Statistical Area. Oviedo is known for its family-friendly atmosphere, historic buildings, and proximity to the University of Central Florida. It spans approximately 16 square miles in eastern Seminole County. So, the county Oviedo, Florida is in is Seminole County.