ZIP codes in Sullivan County
16 ZIPs touch Sullivan County, Tennessee. The blue dashed line is the county border; orange ZIPs reach into it.
16
ZIP codes
7
cross the county line
219,830
people in these ZIPs
95
counties in TN
Most people
Sullivan County ZIP list
More counties in Tennessee
- Scott County9
- Sequatchie County8
- Sevier County12
- Shelby County79
- Smith County15
- Stewart County8
- Sumner County12
- Tipton County10
- Trousdale County5
- Unicoi County6
- Union County11
- Van Buren County7
Questions people actually ask
How many ZIP codes are in Sullivan County, Tennessee?
16 ZIP codes reach into Sullivan County, including 4 PO Box or single-address ZIPs placed by the town they serve. 7 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Sullivan County has the most people?
37660 (Kingsport) has about 40,996 residents, the most of any ZIP touching Sullivan County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Sullivan County and another county?
Yes. ZIP codes follow mail routes, not county lines. Rows marked with a percentage show how much of that ZIP’s land is in Sullivan County. For one address, pin the exact spot on the ZIP finder to see its county.
Where does this list come from?
ZIP areas and their county overlaps come from the Census Bureau’s 2020 ZIP Code Tabulation Area to county relationship file. PO Box ZIPs have no area, so each is placed in the county of the ZIP area nearest the town it serves.
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Updated 2026-11-10 · Where the data comes from