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Del Rio is an unincorporated community in Cocke County, Tennessee, United States. Although it is not a census-designated place, the ZIP Code Tabulation Area for the ZIP Code (37727) that serves Del Rio had a population of 2,138, according to the 2000 census. El Pano is a fictionalized version of Del Rio which features in a blockbuster 20th-century Christian novel and the TV series and films based on it.
Source: Wikipedia