ZIP codes in Grainger County
10 ZIPs touch Grainger County, Tennessee. The blue dashed line is the county border; orange ZIPs reach into it.
10
ZIP codes
7
cross the county line
35,805
people in these ZIPs
95
counties in TN
Most people
Grainger County ZIP list
More counties in Tennessee
- Dyer County12
- Fayette County18
- Fentress County9
- Franklin County16
- Gibson County14
- Giles County17
- Greene County11
- Grundy County10
- Hamblen County10
- Hamilton County37
- Hancock County5
- Hardeman County12
Questions people actually ask
How many ZIP codes are in Grainger County, Tennessee?
10 ZIP codes reach into Grainger County, including 1 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 Grainger County has the most people?
37861 (Rutledge) has about 8,608 residents, the most of any ZIP touching Grainger County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Grainger 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 Grainger 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