Plain

County ZIP codes · Wyoming · FIPS 56013

Fremont County, WY ZIP Codes

Fremont County, Wyoming has 13 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 12 residential and 1 for PO boxes or a single organization. 1 of the residential ones extends into a neighboring county. Median household income ranges from $60,449 in 82501 (Riverton) to $76,959 in 82520 (Lander) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Fremont County?

82310 · Jeffrey City: –82501 · Riverton: $60k82510 · Arapahoe: $55k82512 · Crowheart: –82513 · Dubois: $66k82514 · Fort Washakie: $32k82515 · Hudson: $53k82516 · Kinnear: $40k82520 · Lander: $77k82523 · Pavillion: $57k82642 · Lysite: $80k82649 · Shoshoni: $69k825208251382501826498251282523826428251682514825108231082310 · Jeffrey City: –82501 · Riverton: $60k82510 · Arapahoe: $55k82512 · Crowheart: –82513 · Dubois: $66k82514 · Fort Washakie: $32k82515 · Hudson: $53k82516 · Kinnear: $40k82520 · Lander: $77k82523 · Pavillion: $57k82642 · Lysite: $80k82649 · Shoshoni: $69k825208251382501826498251282523826428251682514825108231082310 · Jeffrey City: –82501 · Riverton: $60k82510 · Arapahoe: $55k82512 · Crowheart: –82513 · Dubois: $66k82514 · Fort Washakie: $32k82515 · Hudson: $53k82516 · Kinnear: $40k82520 · Lander: $77k82523 · Pavillion: $57k82642 · Lysite: $80k82649 · Shoshoni: $69k8252082513825018264982512825238264282514
The residential ZIP codes of Fremont County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024). <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are its ZIP codes?

They carry 12 postal town names.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 12 residential ZIP codes in Fremont County

Residential ZIP codes mainly in Fremont County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
82501 Riverton 19,413 28 $60k $238k 100%
82520 Lander 13,266 9 $77k $338k 100%
82513 Dubois 1,627 1 $66k $383k 100%
82514 Fort Washakie 1,192 7 $32k $92k 100%
82649 Shoshoni 1,152 2 $69k $155k 100%
82523 Pavillion 945 2 $57k $238k 100%
82510 Arapahoe 875 14 $55k $163k 100%
82515 Hudson 437 50 $53k $181k 100%
82516 Kinnear 299 1 $40k – 100%
82512 Crowheart 294 0 – – 100%
82642 Lysite 33 0 $80k – 87%
82310 Jeffrey City no residents 0 – – 100%

Download the 13 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

1 ZIP code of Fremont County extends into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Fremont County and in the neighboring counties
ZIPIn FremontElsewhere
8264287%Natrona County 13%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

PO Box and single-organization ZIP codes

ZIP codes in Fremont County without a residential area (GeoNames postal codes)
ZIPPostal name
82524Saint Stephens

Source: GeoNames postal codes (CC BY 4.0).

Which first three digits do Fremont County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Fremont County's ZIP codes use 3 prefixes: 823, 825 and 826.

Three-digit prefixes of Fremont County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Fremont County's
PrefixSectional centerHereAll codes
823 Cheyenne, WY (SCF 820) 1 14
825 Casper, WY (SCF 826) 10 10
826 Casper, WY (SCF 826) 2 21

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.