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ZIP Code Database - Facts & Stats

Data Last Updated: February 1, 2023

ZIP Codes for City of Saint Peters, MO

Saint Peters, MO Covers 4 ZIP Codes

ZIP CodeTypeCountyPopulation
ZIP Code 63303StandardSaint Charles45,834
ZIP Code 63304StandardSaint Charles40,336
ZIP Code 63366StandardSaint Charles46,175
ZIP Code 63376StandardSaint Charles70,828

Timezone(s):Central (GMT -06:00)
Population:52,575 (More Details)
Male Population:25,352
Female Population:27,223
Median Age:39
ZIP Codes:4
Area Codes:2
Total Area:593 square miles (county)
Land Area:560 square miles (county)
Water Area:32 square miles (county)

Saint Peters, MO Demographic Information *

Total population52,575
Male population25,352
Female population27,223
Median age (years)38.8
White Population48,196
Black Population1,939
Indian Population96
Asian Population971
Hawaiian Population33
Hispanic Population1,319
Median age (Male)36.9
Median age (Female)40.4
Total households20,861
Family households (families)14,244
Average household size2.51
Average family size3.05
Total housing units21,717
* Demographic data is based on 2010 Census. Products


  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],