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ZIP Code Database - Facts & Stats

Data Last Updated: December 1, 2021

ZIP Codes for City of Janesville, IA

Janesville, IA Covers 1 ZIP Code

ZIP CodeTypeCountyPopulationArea Code(s)
ZIP Code 50647StandardBremer1,894319

Timezone(s):Central (GMT -06:00)
Counties:BREMER, IA
Population:930 (More Details)
Male Population:461
Female Population:469
Median Age:40
ZIP Codes:1
Area Codes:1
Total Area:439 square miles (county)
Land Area:435 square miles (county)
Water Area:4 square miles (county)

Janesville, IA Demographic Information *

Total population930
Male population461
Female population469
Median age (years)40.2
White Population915
Black Population6
Indian Population0
Asian Population2
Hawaiian Population0
Hispanic Population3
Median age (Male)39.9
Median age (Female)40.5
Total households398
Family households (families)262
Average household size2.34
Average family size2.9
Total housing units409
* Demographic data is based on 2010 Census.

Janesville, IA Other Information

  • Located in BREMER County, Iowa
  • Janesville, IA is also known as:

71 Cities within 30 miles of Janesville, IA Products


  1. U.S. Postal Service [Last Updated: 12/1/2021],
  2. Internal Data Creation [Last Updated: 12/1/2021],
  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],