Mount Juliet, TN ZIP Codes
Mount Juliet, Tennessee has 2 ZIP codes: for street addresses and for PO boxes.
Mail addressed to Mount Juliet covers nearby places too.
Where the 37122 ZIP code reaches
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37121 has no area on the map: it is a PO box or single-organization ZIP code. Dashed line: Mount Juliet city limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
Check an address in Mount Juliet
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Mount Juliet PO box and business ZIP codes
| ZIP | Type and post office or station |
|---|---|
| 37121 | PO boxes at the Mount Juliet post office Mount Juliet |
| 37122 | street delivery Mount Juliet |
ZIP codes from nearby towns that reach into Mount Juliet
- 37138, mailing town Old Hickory, covers 4 percent of Mount Juliet
Why your mail may say Mount Juliet when you live outside it
Mount Juliet ZIP codes also cover Gladeville and Rural Hill, so a letter addressed to Mount Juliet can go to a home outside the city limits.
The reverse happens too: parts of Mount Juliet use 37138, which mails under a neighboring town's name.
A ZIP code does not set your city, school district or tax. Wilson County property records show which city you are in.
Mount Juliet ZIP code questions
What is the main ZIP code for Mount Juliet?
37122, the ZIP code of the main Mount Juliet post office at 2491 N Mount Juliet Rd.
Which Mount Juliet ZIP codes are for PO boxes only?
37121. Mail to it goes to boxes at the post office, not to street addresses.
What county is Mount Juliet in?
Wilson County.
ZIP codes for towns near Mount Juliet
More towns near Mount Juliet: Brentwood, Murfreesboro, Franklin, Spring Hill, Columbia, Clarksville, Bowling Green, Cookeville, Hopkinsville.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections