Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/OK/DUNCAN

Duncan ZIP codes, Oklahoma

Duncan, OK has 3 ZIP codes (73533, 73534 and 73536) and area code 580. The largest is 73533.

USPS city name
3 ZIP codes
Overlapping the city
3 more
Population
22,958
Area code
580

Mail addressed to Duncan uses the ZIP codes above. 3 more ZIP codes cover part of the city but are addressed as somewhere else; they are listed separately below.

Duncan in numbers

About 22,958 people live in Duncan, in 9,492 households, the 20th-largest of Oklahoma's 832 census places. The median household income is $58,054 a year, 11% below the Oklahoma median of $65,039 (US: $80,734). The median owner-occupied home is valued at $131,500 (34% below the Oklahoma median), and median gross rent is $896 a month. The median age is 39.9; 20.2% of adults 25 and over hold a bachelor's degree or higher (28.3% across Oklahoma); the average commute takes 22 minutes.

Population22,958Duncan22,958
Households9,492Duncan9,492
Median age39.9Duncan39.9Oklahoma37.0US 38.9
Median household income$58,054Duncan$58,054Oklahoma$65,039US $80,734
Median home value$131,500Duncan$131,500Oklahoma$199,800US $332,700
Median gross rent$896Duncan$896Oklahoma$1,014US $1,413
Bachelor's degree or higher20.2%Duncan20.2%Oklahoma28.3%US 35.7%
Mean commute21.9 minDuncan21.9 minOklahoma22.4 minUS 26.4 min
Population density535 / sq miDuncan535 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Duncan city. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Duncan

ZIP codes with the USPS city name Duncan
ZIP City Type Population Median income Median home
73533 Duncan , OK Standard 27,618 $59,906 $144,500
73534 Duncan , OK No street area — — —
73536 Duncan , OK No street area — — —

Other ZIP codes overlapping Duncan

These ZIP codes cover part of Duncan but are addressed as somewhere else.

ZIP codes overlapping Duncan
ZIP City Type Population Median income Median home
73055 Marlow , OK Standard 10,064 $65,991 $164,800
73434 Foster , OK Standard 574 $63,214 $255,000
73529 Comanche , OK Standard 4,898 $70,143 $114,200

Map of Duncan ZIP codes

735337353473536

The ZIP codes of Duncan, OK, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Duncan

The nearest larger towns are Lawton (90,595 people, 28 mi), Wichita Falls, TX (102,581 people, 51 mi) and Ardmore (24,877 people, 51 mi).

Towns near Duncan
TownPopulationDistance
Marlow 4,451 10.3 mi
Lawton 90,595 27.8 mi
Elgin 3,608 28.4 mi

More nearby: every ZIP code in Stephens County · Oklahoma ZIP codes

Cite this page

zipcodes.pro. “Duncan, OK ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ok/duncan

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