ZIP Code 37121 is located in Mount Juliet Tennessee. 37121 is entirely within Wilson County. Regionally, it is located in Metro Nashville.
| ZIP Code Name | Mount Juliet |
| Primary County | Wilson County |
| ZIP Code Type | PO Box |
| Current Time | CDT |
| Coordinates | 36.20488358,-86.51808929 |
| Adjacent ZIP Codes | |
| Region | Metro Nashville |
| Metropolitan/Micropolitan Stat Area | Nashville-Davidson--Murfreesboro--Franklin, TN |
| Time Zone | Central Daylight Time |
| IANA Timezone | America/Chicago |