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 — CITY/MT/ROUNDUP

Roundup ZIP codes, Montana

Roundup, MT has 2 ZIP codes (59072 and 59073) and area code 406. The largest is 59072.

USPS city name
2 ZIP codes
Population
2,003
Area code
406
State
Montana

Roundup in numbers

About 2,003 people live in Roundup, in 861 households. The median household income is $57,847 a year, 20% below the Montana median of $72,509 (US: $80,734). The median owner-occupied home is valued at $166,200 (56% below the Montana median), and median gross rent is $950 a month. The median age is 42.4; 13.5% of adults 25 and over hold a bachelor's degree or higher (35.2% across Montana); the average commute takes 16 minutes.

Population2,003Roundup2,003
Households861Roundup861
Median age42.4Roundup42.4Montana40.4US 38.9
Median household income$57,847Roundup$57,847Montana$72,509US $80,734
Median home value$166,200Roundup$166,200Montana$375,800US $332,700
Median gross rent$950Roundup$950Montana$1,081US $1,413
Bachelor's degree or higher13.5%Roundup13.5%Montana35.2%US 35.7%
Mean commute15.8 minRoundup15.8 minMontana19.1 minUS 26.4 min
Population density1,549 / sq miRoundup1,549 / sq mi

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

ZIP codes addressed as Roundup

ZIP codes with the USPS city name Roundup
ZIP City Type Population Median income Median home
59072 Roundup , MT Standard 4,690 $59,594 $241,200
59073 Roundup , MT No street area — — —

Map of Roundup ZIP codes

5907259073

The ZIP codes of Roundup, MT, 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.

Towns near Roundup

The nearest larger towns are Lockwood (7,181 people, 43 mi), Billings (119,434 people, 46 mi) and Laurel (7,215 people, 55 mi).

More nearby: every ZIP code in Musselshell County · Montana ZIP codes

Cite this page

zipcodes.pro. “Roundup, MT ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/mt/roundup

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