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ZIP Code Database - Facts & Stats

Data Last Updated: December 1, 2022

ZIP Codes for City of Fairfield, IA

Fairfield, IA Covers 2 ZIP Codes

ZIP CodeTypeCountyPopulation
ZIP Code 52556StandardJefferson13,247
ZIP Code 52557UniqueJefferson85

Timezone(s):Central (GMT -06:00)
Population:9,464 (More Details)
Male Population:4,704
Female Population:4,760
Median Age:46
ZIP Codes:2
Area Codes:1
Total Area:437 square miles (county)
Land Area:436 square miles (county)
Water Area:1 square miles (county)

Fairfield, IA Demographic Information *

Total population9,464
Male population4,704
Female population4,760
Median age (years)46
White Population8,545
Black Population191
Indian Population18
Asian Population372
Hawaiian Population1
Hispanic Population344
Median age (Male)43.3
Median age (Female)48.4
Total households4,201
Family households (families)2,218
Average household size2.09
Average family size2.76
Total housing units4,650
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 12/1/2022],
  2. Internal Data Creation [Last Updated: 12/1/2022],
  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],