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County ZIP codes · Wyoming · FIPS 56033

Sheridan County, WY ZIP Codes

Sheridan County, Wyoming has 12 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 11 of the residential ones lie mainly in Sheridan County and 1 mainly in a neighboring county; 3 cross the county line. Median household income ranges from $73,213 in 82801 (Sheridan) to $79,375 in 82836 (Dayton) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Sheridan County?

82801 · Sheridan: $73k82831 · Arvada: $128k82832 · Banner: $94k82833 · Big Horn: –82835 · Clearmont: $104k82836 · Dayton: $79k82837 · Leiter: $55k82838 · Parkman: $66k82839 · Ranchester: $58k82842 · Story: $106k82844 · Wolf: –82845 · Wyarno: –828318280182835828368283282838828398283382845828448283782801 · Sheridan: $73k82831 · Arvada: $128k82832 · Banner: $94k82833 · Big Horn: –82835 · Clearmont: $104k82836 · Dayton: $79k82837 · Leiter: $55k82838 · Parkman: $66k82839 · Ranchester: $58k82842 · Story: $106k82844 · Wolf: –82845 · Wyarno: –8283182801828358283682832828388283982833828448283782801 · Sheridan: $73k82831 · Arvada: $128k82832 · Banner: $94k82833 · Big Horn: –82835 · Clearmont: $104k82836 · Dayton: $79k82837 · Leiter: $55k82838 · Parkman: $66k82839 · Ranchester: $58k82842 · Story: $106k82844 · Wolf: –82845 · Wyarno: –8283182801828358283682832828388283982833
The residential ZIP codes of Sheridan 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 Sheridan County

11 ZIP codes lie mainly in Sheridan County; 1 more reaches into it from a neighboring county and follows the first table.

Residential ZIP codes mainly in Sheridan County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
82801 Sheridan 26,310 50 $73k $387k 97%
82839 Ranchester 1,661 15 $58k $386k 100%
82832 Banner 1,386 10 $94k $895k 79%
82836 Dayton 1,077 3 $79k $329k 100%
82842 Story 567 63 $106k $358k 100%
82838 Parkman 377 3 $66k $590k 100%
82835 Clearmont 362 1 $104k $400k 100%
82833 Big Horn 247 2 – $679k 100%
82845 Wyarno 55 1 – – 100%
82837 Leiter 39 3 $55k $400k 100%
82844 Wolf 6 0 – – 100%

Partly in Sheridan County

Residential ZIP codes mainly in another county that reach at least 1% into Sheridan County, by their share here
In this county
82831 Arvada 153 0 $128k $581k 34%

Download the 12 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?

3 ZIP codes of Sheridan County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Sheridan County and in the neighboring counties
ZIPIn SheridanElsewhere
8280197%Big Horn County 3%
8283279%Johnson County 21%
8283134%Campbell County 34%; Johnson County 32%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Sheridan County starts with 828.

Three-digit prefixes of Sheridan 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 Sheridan County's
PrefixSectional centerHereAll codes
828 Casper, WY (SCF 826) 12 14

12 of the 14 ZIP codes that start with 828 are Sheridan County's, all sorted at Casper, WY (SCF 826). The other 2 are 82834 (Buffalo), 82840 (Saddlestring, PO Box or unique).

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