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ZIP Code Database - Facts & Stats

Data Last Updated: May 1, 2022

ZIP Codes for City of Sidney, MT

Sidney, MT Covers 1 ZIP Code

ZIP CodeTypeCountyPopulationArea Code(s)
ZIP Code 59270StandardRichland7,339406

Timezone(s):Mountain (GMT -07:00)
Population:5,191 (More Details)
Male Population:2,629
Female Population:2,562
Median Age:39
ZIP Codes:1
Area Codes:1
Total Area:2,103 square miles (county)
Land Area:2,084 square miles (county)
Water Area:19 square miles (county)

Sidney, MT Demographic Information *

Total population5,191
Male population2,629
Female population2,562
Median age (years)39.3
White Population4,925
Black Population3
Indian Population95
Asian Population20
Hawaiian Population0
Hispanic Population179
Median age (Male)37.6
Median age (Female)41.3
Total households2,304
Family households (families)1,378
Average household size2.24
Average family size2.85
Total housing units2,467
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 5/1/2022],
  2. Internal Data Creation [Last Updated: 5/1/2022],
  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],