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ZIP Code Database - Facts & Stats

Data Last Updated: March 1, 2023

ZIP Codes for City of Watertown, SD

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Area Code(s):605
Timezone(s):Central (GMT -06:00)
City Population:21,482 (More Details)
CBSA:Watertown, SD
Congressional District(s):No Districts
Land Area:688 square miles (county)
Water Area:29 square miles (county)

1 ZIP Code

Watertown, SD ZIP Code Boundaries

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Watertown, SD Covers 1 ZIP Code

ZIP CodeTypePopulation% of PopulationAliases

Watertown, SD Demographic Information *

Total population**21,482
Male population10,563
Female population10,919
Median age (years)36.6
White Population20,361
Black Population81
Indian Population510
Asian Population108
Hawaiian Population0
Hispanic Population345
Median age (Male)34.6
Median age (Female)38.8
Total households9,278
Family households (families)5,563
Average household size2.28
Average family size2.9
Total housing units10,050
* Demographic data is based on 2010 Census for the City of WATERTOWN.
** 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],