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/IA/COUNTY/MONTGOMERY

Montgomery County, IA ZIP codes

There are 7 ZIP codes in Montgomery County, IA, in 6 towns, from 50847 to 51591. The largest are 51566 (Red Oak), 50864 (Villisca) and 51573 (Stanton).

The county seat is Red Oak.

ZIP codes
7
Towns
6
County seat
Red Oak
County FIPS
19137
State
Iowa
Population
10,214
Median household income
$63,666
Land area
424 sq mi

Montgomery County ZIP codes by town

Red Oak (county seat)
51566, 51591

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 Montgomery County ZIP codes

50847508645153251533515665157351591

The ZIP codes of Montgomery 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.

Montgomery County in numbers

About 10,214 people live in Montgomery County, in 4,585 households, the 72nd most populous of Iowa's 99 counties. The median household income is $63,666 a year, 15% below the Iowa median of $75,059 (US: $80,734). The median owner-occupied home is valued at $121,400 (42% below the Iowa median), and median gross rent is $814 a month. The median age is 43.5; 20.4% of adults 25 and over hold a bachelor's degree or higher (31.4% across Iowa); the average commute takes 22 minutes.

Population10,214Montgomery10,214
Households4,585Montgomery4,585
Median age43.5Montgomery43.5Iowa38.6US 38.9
Median household income$63,666Montgomery$63,666Iowa$75,059US $80,734
Median home value$121,400Montgomery$121,400Iowa$208,000US $332,700
Median gross rent$814Montgomery$814Iowa$972US $1,413
Bachelor's degree or higher20.4%Montgomery20.4%Iowa31.4%US 35.7%
Mean commute22.3 minMontgomery22.3 minIowa19.8 minUS 26.4 min
Population density24 / sq miMontgomery24 / 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 Montgomery County

Largest towns in Montgomery County
TownZIP codesPopulation
Red Oak 2 5,510
Villisca 1 1,048
Emerson 1 570
Stanton 1 522
Elliott 1 420
Grant 1 35

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 Montgomery County.

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

Every ZIP code in Montgomery County, with figures

ZIP codes in Montgomery County
ZIP City Type Population Median income Median home
50847 Grant , IA Standard 35 $68,125 $40,000
50864 Villisca , IA Standard 1,662 $69,861 $109,900
51532 Elliott , IA Standard 644 $65,375 $99,400
51533 Emerson , IA Standard 844 $68,750 $136,500
51566 Red Oak , IA Standard 7,010 $56,637 $134,200
51573 Stanton , IA Standard 979 $86,438 $133,800
51591 Red Oak , IA No street area — — —

Cite this page

zipcodes.pro. “Montgomery County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/ia/county/montgomery

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