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/WI/COUNTY/IRON

Iron County, WI ZIP codes

There are 7 ZIP codes in Iron County, WI, in 7 towns, from 54525 to 54565. The largest are 54534 (Hurley), 54547 (Mercer) and 54550 (Montreal). 1 more crosses into it from a neighbouring county: 54552.

The county seat is Hurley.

ZIP codes
7
Partly in it
1 more
Towns
7
County seat
Hurley
County FIPS
55051
Population
6,210
Median household income
$60,625
Land area
758 sq mi

Iron County ZIP codes by town

Hurley (county seat)
54534

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.

ZIP codes partly in Iron County

This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of Iron County.

Map of Iron County ZIP codes

54525545345453654547545505455954565

The ZIP codes of Iron 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.

Iron County in numbers

About 6,210 people live in Iron County, in 3,109 households, the 70th most populous of Wisconsin's 72 counties. The median household income is $60,625 a year, 22% below the Wisconsin median of $77,485 (US: $80,734). The median owner-occupied home is valued at $165,900 (38% below the Wisconsin median), and median gross rent is $662 a month. The median age is 56.1; 26.0% of adults 25 and over hold a bachelor's degree or higher (33.4% across Wisconsin); the average commute takes 22 minutes.

Population6,210Iron6,210
Households3,109Iron3,109
Median age56.1Iron56.1Wisconsin40.2US 38.9
Median household income$60,625Iron$60,625Wisconsin$77,485US $80,734
Median home value$165,900Iron$165,900Wisconsin$266,500US $332,700
Median gross rent$662Iron$662Wisconsin$1,087US $1,413
Bachelor's degree or higher26.0%Iron26.0%Wisconsin33.4%US 35.7%
Mean commute21.9 minIron21.9 minWisconsin22.2 minUS 26.4 min
Population density8 / sq miIron8 / 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 Iron County

Largest towns in Iron County
TownZIP codesPopulation
Hurley 1 1,354
Montreal 1 909
Mercer 1 365
Gile 1 318
Iron Belt 1 140
Saxon 1 67
Upson 1 38

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 Iron County.

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

Every ZIP code in Iron County, with figures

ZIP codes in Iron County
ZIP City Type Population Median income Median home
54525 Gile , WI Standard 318 $74,375 $81,000
54534 Hurley , WI Standard 2,393 $53,468 $123,600
54536 Iron Belt , WI Standard 154 $57,917 $66,800
54547 Mercer , WI Standard 1,549 $63,500 $306,600
54550 Montreal , WI Standard 768 $64,583 $112,200
54559 Saxon , WI Standard 837 $69,696 $159,300
54565 Upson , WI Standard 38 $38,125 $170,800

Cite this page

zipcodes.pro. “Iron County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/wi/county/iron

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