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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 (37722) that serves Cosby had a population of 5,201 as of the 2000 U.S. Census. The community has given its name to the northeastern section of the Great Smoky Mountains National Park, which forms its southern boundary.
As of the census of 2000, there were 5,201 people, 2,091 households, and 1,525 families residing in the Zip Code Tabulation Area for the zip code (37722) that serves Cosby. The racial makeup of this area was 98.8% White, 1% Native American and 0.2% Asian, and 0.2% African American. Hispanics and Latinos comprise 0.9% of the population.
Of the 2,091 households, 31.3% had children under the age of 18 living with them, 56.8% were married couples living together, 11.9% had a female householder with no husband present, and 27.1% were non-families. 22.1% of all households were made up of individuals and 21.8% had someone living alone who was 65 years of age or older. The average household size was 2.49 and the average family size was 2.89.
76.2% of the population was 18 years of age or older with 14.4% being 62 years of age or older. The median age was 38.1 years. The population was 48.1% male and 51.9% female.
The median income for a household in the area was $26,533, and the median income for a family was $30,444. The per capita income for the city was $12,992. About 9.2% of families and 12.4% of the population were below the poverty line.