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/IA/GRINNELL

Grinnell ZIP code, Iowa

The ZIP code for Grinnell, IA is 50112, and its area code is 641.

USPS city name
1 ZIP code
Population
9,505
Area code
641
State
Iowa

Grinnell in numbers

About 9,505 people live in Grinnell, in 3,635 households, the 44th-largest of Iowa's 1,017 census places. The median household income is $65,320 a year, 13% below the Iowa median of $75,059 (US: $80,734). The median owner-occupied home is valued at $209,500 (about the same as the Iowa median), and median gross rent is $895 a month. The median age is 36.5; 37.5% of adults 25 and over hold a bachelor's degree or higher (31.4% across Iowa); the average commute takes 12 minutes.

Population9,505Grinnell9,505
Households3,635Grinnell3,635
Median age36.5Grinnell36.5Iowa38.6US 38.9
Median household income$65,320Grinnell$65,320Iowa$75,059US $80,734
Median home value$209,500Grinnell$209,500Iowa$208,000US $332,700
Median gross rent$895Grinnell$895Iowa$972US $1,413
Bachelor's degree or higher37.5%Grinnell37.5%Iowa31.4%US 35.7%
Mean commute12.3 minGrinnell12.3 minIowa19.8 minUS 26.4 min
Population density1,671 / sq miGrinnell1,671 / sq mi

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

ZIP codes addressed as Grinnell

ZIP codes with the USPS city name Grinnell
ZIP City Type Population Median income Median home
50112 Grinnell , IA Standard 11,862 $67,078 $214,900

Map of Grinnell ZIP codes

50112

The ZIP codes of Grinnell, IA, 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 Grinnell

The nearest larger towns are Newton (15,700 people, 16 mi), Marshalltown (27,626 people, 23 mi) and Pella (10,720 people, 25 mi).

Towns near Grinnell
TownPopulationDistance
Newton 15,700 16.5 mi
Tama 3,051 17.7 mi
Marshalltown 27,626 22.7 mi
Pella 10,720 24.9 mi

More nearby: every ZIP code in Poweshiek County · Iowa ZIP codes

Cite this page

zipcodes.pro. “Grinnell, IA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ia/grinnell

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