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ZIP Code Database - Facts & Stats

Data Last Updated: June 1, 2023

ZIP Codes for City of Grafton, IA

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Counties:WORTH, IA
Area Code(s):641
Timezone(s):Central (GMT -06:00)
City Population:252 (More Details)
CBSA:Mason City, IA
Congressional District(s):02
Land Area:400 square miles (county)
Water Area:2 square miles (county)

1 ZIP Code

Grafton, IA ZIP Code Boundaries

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Grafton, IA Covers 1 ZIP Code

ZIP CodeTypePopulation% of PopulationAliases

Grafton, IA Demographic Information *

Total population**252
Male population129
Female population123
Median age (years)43.5
White Population249
Black Population0
Indian Population0
Asian Population1
Hawaiian Population0
Hispanic Population0
Median age (Male)42.5
Median age (Female)43.6
Total households114
Family households (families)70
Average household size2.21
Average family size2.84
Total housing units126
* Demographic data is based on 2010 Census for the City of GRAFTON.
** City and ZIP Code Population will not be equal due to differences in their geographies.


  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],