Rockford is a city in Blount County, Tennessee. Its population was 822 at the 2020 census. It is included in the Knoxville, Tennessee Metropolit…Rockford is a city in Blount County, Tennessee. Its population was 822 at the 2020 census. It is included in the Knoxville, Tennessee Metropolitan Statistical Area. Rockford is named for a river ford used by early 19th-century settlers and merchants travelling between Knoxville and Maryville. As its name implies, the ford was unusually rocky, and thus preferred by travellers, as large amounts of silt and sand made much of the Little River difficult to cross. The community was called "Rocky Ford" by the early 1800s.