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zipcodes.pro — CITY/IA/ONAWA

Onawa ZIP code, Iowa

The ZIP code for Onawa, IA is 51040, and its area code is 712.

USPS city name
1 ZIP code
Population
2,839
Area code
712
State
Iowa

Onawa in numbers

About 2,839 people live in Onawa, in 1,256 households. The median household income is $62,143 a year, 17% below the Iowa median of $75,059 (US: $80,734). The median owner-occupied home is valued at $145,800 (30% below the Iowa median), and median gross rent is $1,037 a month. The median age is 35.5; 19.4% of adults 25 and over hold a bachelor's degree or higher (31.4% across Iowa); the average commute takes 18 minutes.

Population2,839Onawa2,839
Households1,256Onawa1,256
Median age35.5Onawa35.5Iowa38.6US 38.9
Median household income$62,143Onawa$62,143Iowa$75,059US $80,734
Median home value$145,800Onawa$145,800Iowa$208,000US $332,700
Median gross rent$1,037Onawa$1,037Iowa$972US $1,413
Bachelor's degree or higher19.4%Onawa19.4%Iowa31.4%US 35.7%
Mean commute18.4 minOnawa18.4 minIowa19.8 minUS 26.4 min
Population density539 / sq miOnawa539 / sq mi

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

ZIP codes addressed as Onawa

ZIP codes with the USPS city name Onawa
ZIP City Type Population Median income Median home
51040 Onawa , IA Standard 3,500 $71,179 $151,600

Map of Onawa ZIP codes

51040

The ZIP codes of Onawa, 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 Onawa

The nearest larger towns are Sergeant Bluff (5,171 people, 29 mi), Blair, NE (7,914 people, 34 mi) and West Point, NE (3,471 people, 34 mi).

Towns near Onawa
TownPopulationDistance
Sergeant Bluff 5,171 28.9 mi

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

Cite this page

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

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