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/COLUMBIA

Columbia ZIP code, Iowa

The ZIP code for Columbia, IA is 50057, and its area code is 641.

USPS city name
1 ZIP code
Population
327
Area code
641
State
Iowa

NANPA lists no telephone rate centre for Columbia itself, so these are the area codes of the nearest one, Melcher Dallas (6.3 miles). A town on an area-code boundary can differ from its neighbour.

Columbia in numbers

About 327 people live in Columbia, in 89 households. The median household income is $118,882 a year, 58% above the Iowa median of $75,059 (US: $80,734). The median owner-occupied home is valued at $221,300 (6% above the Iowa median).

Population327Columbia327
Households89Columbia89
Median household income$118,882Columbia$118,882Iowa$75,059US $80,734
Median home value$221,300Columbia$221,300Iowa$208,000US $332,700

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

ZIP codes addressed as Columbia

ZIP codes with the USPS city name Columbia
ZIP City Type Population Median income Median home
50057 Columbia , IA Standard 327 $118,882 $221,300

Map of Columbia ZIP codes

50057

The ZIP codes of Columbia, 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 Columbia

The nearest larger towns are Melcher-Dallas (1,176 people, 6.5 mi), Knoxville (7,473 people, 9.7 mi) and Lovilia (414 people, 12 mi).

Towns near Columbia
TownPopulationDistance
Knoxville 7,473 9.7 mi
Chariton 4,242 14.5 mi
Pella 10,720 19.2 mi
Albia 3,663 20.2 mi
Indianola 16,044 25.7 mi
Oskaloosa 11,504 26.8 mi
Carlisle 4,255 29.8 mi

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

Cite this page

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

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