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ZIP Code Database - Facts & Stats

Data Last Updated: February 1, 2023

ZIP Codes for City of Keystone, IA

Keystone, IA Covers 1 ZIP Code

ZIP CodeTypeCountyPopulation
ZIP Code 52249StandardBenton965

Timezone(s):Central (GMT -06:00)
Counties:BENTON, IA
Population:622 (More Details)
Male Population:280
Female Population:342
Median Age:43
ZIP Codes:1
Area Codes:1
Total Area:718 square miles (county)
Land Area:716 square miles (county)
Water Area:2 square miles (county)

Keystone, IA Demographic Information *

Total population622
Male population280
Female population342
Median age (years)42.8
White Population617
Black Population0
Indian Population3
Asian Population1
Hawaiian Population0
Hispanic Population4
Median age (Male)40.1
Median age (Female)46
Total households250
Family households (families)165
Average household size2.34
Average family size2.93
Total housing units280
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 2/1/2023],
  2. Internal Data Creation [Last Updated: 2/1/2023],
  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],