Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — STATE/WY/COUNTY/HOT-SPRINGS

Hot Springs County, WY ZIP codes

Hot Springs County, WY has 2 ZIP codes, in 2 towns: 82443 and 82430.

The county seat is Thermopolis.

ZIP codes
2
Towns
2
County seat
Thermopolis
County FIPS
56017
State
Wyoming
Population
4,620
Median household income
$61,250
Land area
2,004 sq mi

Hot Springs County ZIP codes by town

Thermopolis (county seat)
82443

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of Hot Springs County ZIP codes

The ZIP codes of Hot Springs County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Hot Springs County in numbers

About 4,620 people live in Hot Springs County, in 2,140 households, the 22nd most populous of Wyoming's 23 counties. The median household income is $61,250 a year, 20% below the Wyoming median of $76,176 (US: $80,734). The median owner-occupied home is valued at $227,500 (27% below the Wyoming median), and median gross rent is $887 a month. The median age is 43.3; 26.7% of adults 25 and over hold a bachelor's degree or higher (30.6% across Wyoming); the average commute takes 14 minutes.

Population4,620Hot Springs4,620
Households2,140Hot Springs2,140
Median age43.3Hot Springs43.3Wyoming39.1US 38.9
Median household income$61,250Hot Springs$61,250Wyoming$76,176US $80,734
Median home value$227,500Hot Springs$227,500Wyoming$309,700US $332,700
Median gross rent$887Hot Springs$887Wyoming$992US $1,413
Bachelor's degree or higher26.7%Hot Springs26.7%Wyoming30.6%US 35.7%
Mean commute13.8 minHot Springs13.8 minWyoming18.8 minUS 26.4 min
Population density2 / sq miHot Springs2 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Hot Springs County

Largest towns in Hot Springs County
TownZIP codesPopulation
Thermopolis 1 2,709
Kirby 1 60

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Hot Springs County.

Not sure you are in Hot Springs County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Hot Springs County, with figures

ZIP codes in Hot Springs County
ZIP City Type Population Median income Median home
82430 Kirby , WY Standard 77 $35,417 $86,300
82443 Thermopolis , WY Standard 4,533 $62,767 $230,000

Cite this page

zipcodes.pro. “Hot Springs County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/wy/county/hot-springs

Underlying data is public domain or openly licensed — sources, vintages and licences.