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ZIP Code Database - Facts & Stats

Data Last Updated: July 1, 2022

ZIP Codes for City of Duncan, OK

Duncan, OK Covers 3 ZIP Codes

ZIP CodeTypeCountyPopulationArea Code(s)
ZIP Code 73533StandardStephens28,434580
ZIP Code 73534P.O. BoxStephens0580
ZIP Code 73536UniqueStephens0580

Timezone(s):Central (GMT -06:00)
Population:23,431 (More Details)
Male Population:11,309
Female Population:12,122
Median Age:39
ZIP Codes:3
Area Codes:1
Total Area:891 square miles (county)
Land Area:870 square miles (county)
Water Area:21 square miles (county)

Duncan, OK Demographic Information *

Total population23,431
Male population11,309
Female population12,122
Median age (years)39.2
White Population19,278
Black Population780
Indian Population1,090
Asian Population183
Hawaiian Population5
Hispanic Population2,085
Median age (Male)37.3
Median age (Female)41.3
Total households9,670
Family households (families)6,369
Average household size2.38
Average family size2.93
Total housing units11,064
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 7/1/2022],
  2. Internal Data Creation [Last Updated: 7/1/2022],
  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],