83121 ZIP Code — Frontier, WY
Lincoln County, Wyoming
ZIP code 83121 is located in Frontier, Wyoming, within Lincoln County. It covers approximately 2.91 square miles and serves a population of 0 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 307.
0
population
2.91
sq mi land
Standard
ZIP type
Mountain (MT)
timezone
83121 ZIP code map
Cities in ZIP code 83121
Below are the cities the US Postal Service accepts for ZIP code 83121. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Frontier | Acceptable |
Demographics
updated 06/2026
| Population | |
|---|---|
| Total population | 0 |
| Population density | 0 / sq mi |
| State FIPS | 56 |
| County FIPS | 023 |
| Geography | |
|---|---|
| Land area | 2.91 sq mi |
| Water area | 0.00 sq mi |
| Latitude | 41.8103 |
| Longitude | -110.5382 |
| Timezone | Mountain (MT) |
| Area code | 307 |