First three digits · Wyoming
ZIP Codes Starting with
14 ZIP codes start with 823, sorted at the Cheyenne, WY (SCF 820) sectional center (USPS labeling list L005, effective October 1, 2026) in Wyoming: 14 residential ZIP codes across 3 counties (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 823 mean?
The first digit, 8, is one of ten national areas (Arizona, Colorado, Idaho, New Mexico, Nevada, Utah and Wyoming). The first three, 823, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 823 to the Cheyenne, WY (SCF 820) facility. The last two digits pick the delivery area. By residents, the largest town names among the 823 ZIP codes are Rawlins, Saratoga, Encampment, Hanna, Baggs and Sinclair.
The same facility sorts 3 prefixes, 62 ZIP codes in all: 820, 822, 823.
Where are the 823 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 823
| County | ||||||
|---|---|---|---|---|---|---|
| 82301 | Rawlins | Carbon County | 8,180 | 9 | $63k | $217k |
| 82310 | Jeffrey City | Fremont County | no residents | 0 | – | – |
| 82321 | Baggs | Carbon County | 752 | 4 | $70k | $228k |
| 82322 | Bairoil | Sweetwater County | 149 | 28 | $40k | $24k |
| 82323 | Dixon | Carbon County | 267 | 17 | $74k | $119k |
| 82324 | Elk Mountain | Carbon County | 175 | 1 | $59k | $228k |
| 82325 | Encampment | Carbon County | 867 | 2 | $74k | $247k |
| 82327 | Hanna | Carbon County | 789 | 3 | $76k | $123k |
| 82329 | Medicine Bow | Carbon County | 493 | 2 | – | $78k |
| 82331 | Saratoga | Carbon County | 2,250 | 4 | $96k | $364k |
| 82332 | Savery | Carbon County | 20 | 0 | – | – |
| 82334 | Sinclair | Carbon County | 560 | 3 | $75k | $227k |
| 82335 | Walcott | Carbon County | no residents | 0 | – | – |
| 82336 | Wamsutter | Sweetwater County | 269 | 1 | $57k | $99k |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.