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ZIP Code Database - Facts & Stats

Data Last Updated: October 1, 2021

ZIP Codes for City of Onawa, IA

Onawa, IA Covers 1 ZIP Code

ZIP CodeTypeCountyPopulationArea Code(s)
ZIP Code 51040StandardMonona3,712712

Timezone(s):Central (GMT -06:00)
Counties:MONONA, IA
Population:2,998 (More Details)
Male Population:1,424
Female Population:1,574
Median Age:45
ZIP Codes:1
Area Codes:1
Total Area:699 square miles (county)
Land Area:694 square miles (county)
Water Area:5 square miles (county)

Onawa, IA Demographic Information *

Total population2,998
Male population1,424
Female population1,574
Median age (years)44.8
White Population2,890
Black Population13
Indian Population50
Asian Population10
Hawaiian Population0
Hispanic Population35
Median age (Male)41.6
Median age (Female)47.2
Total households1,345
Family households (families)756
Average household size2.18
Average family size2.91
Total housing units1,519
* Demographic data is based on 2010 Census.

Onawa, IA Other Information

  • Located in MONONA County, Iowa
  • Onawa, IA is also known as:
    • TURIN, IA

60 Cities within 30 miles of Onawa, IA Products


  1. U.S. Postal Service [Last Updated: 10/1/2021],
  2. Internal Data Creation [Last Updated: 10/1/2021],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],