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ZIP Code Database - Facts & Stats

Data Last Updated: March 1, 2023

ZIP Codes for City of Allen, SD

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Counties:BENNETT, SD
Area Code(s):605
Timezone(s):Mountain (GMT -07:00)
City Population:420 (More Details)
Congressional District(s):No Districts
Land Area:1,185 square miles (county)
Water Area:6 square miles (county)

1 ZIP Code

Allen, SD ZIP Code Boundaries

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Allen, SD Covers 1 ZIP Code

ZIP CodeTypePopulation% of PopulationAliases

Allen, SD Demographic Information *

Total population**420
Male population195
Female population225
Median age (years)17.5
White Population14
Black Population0
Indian Population405
Asian Population0
Hawaiian Population0
Hispanic Population4
Median age (Male)14.9
Median age (Female)18.8
Total households81
Family households (families)64
Average household size5.19
Average family size5.77
Total housing units84
* Demographic data is based on 2010 Census for the City of ALLEN.
** 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],