Oviedo is a city in Seminole County, Florida, United States. The population was 33,342 as of the 2010 census, a 26.7% increase from 26,316 recorded in the 2000 census. It is part of the OrlandoKissimmeeSanford Metropolitan Statistical Area. In the late 1870s, individuals living a couple miles south of Lake Jesup needed an easily accessible post office in the Florida back country. Andrew Jeremy Maine, an early settler and shop-owner, decided to file paperwork for a post office; in his first site location report he needed a unique name, one that no other post office in Florida had. Aulin liked having a Spanish name, "to go with the Spanish name of the state," and decided to name his post office location Oviedo after the Oviedo city Asturias capital, in northern Spain and Oviedo University. Some say he visited the University, others say he just liked the sound, most agree he likely pronounced it "Oh-vee-Ay-Doh" rather than the Americanized way of "Oh-VEE-doh." According to the United States Census Bureau, the city has a total area of 40.0 km (15.4 mi). 15.1 square miles (39km2) of it is land and 0.3 square miles (0.78km2) of it (2.07%) is water. Oviedo is located about 20 minutes from downtown Orlando, Fla. by highway (SR 417 and SR 408). The Econlockhatchee River runs through the east part of the city, and a tributary, the Little Econlockhatchee River, runs through the southern part of the city.