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/OSKALOOSA

Oskaloosa ZIP code, Iowa

The ZIP code for Oskaloosa, IA is 52577, and its area code is 641.

USPS city name
1 ZIP code
Population
11,504
Area code
641
State
Iowa

Oskaloosa in numbers

About 11,504 people live in Oskaloosa, in 4,590 households, the 34th-largest of Iowa's 1,017 census places. The median household income is $64,004 a year, 15% below the Iowa median of $75,059 (US: $80,734). The median owner-occupied home is valued at $153,300 (26% below the Iowa median), and median gross rent is $831 a month. The median age is 37.6; 25.4% of adults 25 and over hold a bachelor's degree or higher (31.4% across Iowa); the average commute takes 16 minutes.

Population11,504Oskaloosa11,504
Households4,590Oskaloosa4,590
Median age37.6Oskaloosa37.6Iowa38.6US 38.9
Median household income$64,004Oskaloosa$64,004Iowa$75,059US $80,734
Median home value$153,300Oskaloosa$153,300Iowa$208,000US $332,700
Median gross rent$831Oskaloosa$831Iowa$972US $1,413
Bachelor's degree or higher25.4%Oskaloosa25.4%Iowa31.4%US 35.7%
Mean commute16.0 minOskaloosa16.0 minIowa19.8 minUS 26.4 min
Population density1,428 / sq miOskaloosa1,428 / sq mi

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

ZIP codes addressed as Oskaloosa

ZIP codes with the USPS city name Oskaloosa
ZIP City Type Population Median income Median home
52577 Oskaloosa , IA Standard 14,585 $66,084 $163,300

Map of Oskaloosa ZIP codes

52577

The ZIP codes of Oskaloosa, 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 Oskaloosa

The nearest larger towns are Ottumwa (25,430 people, 22 mi), Newton (15,700 people, 35 mi) and Indianola (16,044 people, 48 mi).

Towns near Oskaloosa
TownPopulationDistance
Pella 10,720 16.3 mi
Albia 3,663 20.2 mi
Ottumwa 25,430 21.8 mi
Knoxville 7,473 24.0 mi

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

Cite this page

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

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