There are 8 zip codes in Sullivan County, Tennessee. The most populated is 37660, located in Kingsport. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
37660Kingsport39,481
37620Bristol38,245
37664Kingsport28,804
37617Blountville14,519
37663Kingsport13,658
37618Bluff City12,792
37686Piney Flats8,848
37665Kingsport5,540

Sullivan County, Tennessee Zip Codes by Population (2024)