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ZIP Code Database - Facts & Stats

Data Last Updated: March 1, 2023

ZIP Codes for City of New Underwood, SD

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Area Code(s):605
Timezone(s):Mountain (GMT -07:00)
City Population:660 (More Details)
CBSA:Rapid City, SD
Congressional District(s):No Districts
Land Area:2,777 square miles (county)
Water Area:8 square miles (county)

1 ZIP Code

New Underwood, SD ZIP Code Boundaries

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New Underwood, SD Covers 1 ZIP Code

ZIP CodeTypePopulation% of PopulationAliases

New Underwood, SD Demographic Information *

Total population**660
Male population331
Female population329
Median age (years)39.9
White Population591
Black Population0
Indian Population42
Asian Population1
Hawaiian Population0
Hispanic Population18
Median age (Male)37.9
Median age (Female)41.9
Total households248
Family households (families)162
Average household size2.47
Average family size3.09
Total housing units280
* Demographic data is based on 2010 Census for the City of NEW UNDERWOOD.
** 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],