ZIP codes in Carter County
10 ZIPs touch Carter County, Tennessee. The blue dashed line is the county border; orange ZIPs reach into it.
10
ZIP codes
6
cross the county line
125,743
people in these ZIPs
95
counties in TN
Most people
Carter County ZIP list
More counties in Tennessee
- Bledsoe County9
- Blount County14
- Bradley County10
- Campbell County11
- Cannon County9
- Carroll County15
- Cheatham County12
- Chester County12
- Claiborne County13
- Clay County7
- Cocke County9
- Coffee County11
Questions people actually ask
How many ZIP codes are in Carter County, Tennessee?
10 ZIP codes reach into Carter County, including 2 PO Box or single-address ZIPs placed by the town they serve. 6 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Carter County has the most people?
37604 (Johnson City) has about 39,097 residents, the most of any ZIP touching Carter County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Carter 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 Carter 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