Residential delivery area · Oklahoma
ZIP Code 73533: Duncan, OK
ZIP code 73533 uses the postal name Duncan, Oklahoma and lies entirely in Stephens County (Census 2020 ZIP-county file). About 28,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $59,906 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Duncan (10%) and Empire City (2%), and 5% in smaller places; 83% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Duncan · its only residential ZIP
- County
- Stephens County
- Census places
- Duncan (10%); Empire City (2%)
- Micro area
- Duncan, OK
- House district
- OK-4 119th Congress
- State
- Oklahoma
- Time zone
- Central
- Land area
- 329.5 sq mi · 84 people per sq mi
Where is ZIP code 73533?
73533 centers on 34.505°, -97.867° and covers 329.5 square miles of land plus 4.3 of water. It borders 10 ZIP codes: 73055, 73491, 73529, 73442, 73425, 73488, 73434, 73481, 73501, 73572.
The map draws ZIP code areas only. For the streets inside 73533, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 73533 compare with the rest of Stephens County?
| Measure | 73533 | In Stephens County | In OK |
|---|---|---|---|
| People (ACS 2020-2024) | 27,618 | 1st of 9 | 38th of 664 |
| Median household income | $60k | 3rd of 3 | 158th of 343 |
| Median home value | $145k | 2nd of 3 | 216th of 346 |
Its median household income is higher than in 29% of U.S. residential ZIP codes, and it is denser than 51% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 73533?
The 2020 Census counted 27,396 people in 73533; the ACS, which samples households over 2020-2024, estimates 27,618. Between the 2010 and 2020 censuses its population fell 3.7% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 27,618
- 2020 Census count
- 27,396−3.7% since 2010 (28,434)
- Households
- 11,292
- Median age
- 40.6
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 73533?
Of the 27,618 people the ACS estimates in 73533, 22.3% are under 18 and 20.8% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (75.2%), then Other or two or more (11.7%).
- Under 1822.3%
- 18 to 6457.0%
- 65 and older20.8%
- White, not Hispanic75.2%
- Other or two or more11.7%
- Hispanic or Latino10.5%
- Black, not Hispanic1.9%
- Asian, not Hispanic0.7%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 73533 earn?
Median household income is $59,906 (ACS 2020-2024), the 3rd highest of the 3 ranked ZIP codes in Stephens County. It is not measurably different from 2015-2019 ($57,507 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $59,906
- Income per person
- $35,590
- Below the poverty line
- 18.6%
- Unemployed (of the labor force)
- 5.9%
- Adults 25+ with a bachelor's degree
- 20.5%
- Adjusted gross income per tax return, 2022
- $64,46411,080 returns; wages 63% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 73533?
FHFA's house price index for 73533, built from repeat sales and appraisals of the same homes, rose 63% from 2015 to 2025 and rose 59% from 2020 to 2025, and moved +13.7% in 2025.
- Median home value (owners' estimate)
- $144,500
- Median gross rent
- $892
- Homes owned by their occupants
- 71.2%
- Housing units
- 12,997
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 73533?
735 business establishments had a location in this ZIP code in 2023, 10 fewer than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade113
- Health care and social assistance104
- Other services (except public administration)71
- Professional, scientific, and technical services64
- Accommodation and food services62
- Finance and insurance52
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 73533?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 73055 | Marlow | 10,064 | $66k | 10.2 mi |
| 73491 | Velma | 791 | $84k | 12.1 mi |
| 73529 | Comanche | 4,898 | $70k | 12.6 mi |
| 73442 | Loco | 275 | $52k | 16.1 mi |
| 73425 | Countyline | 201 | $36k | 17.1 mi |
| 73488 | Tussy | 11 | – | 17.8 mi |
| 73434 | Foster | 574 | $63k | 18.2 mi |
| 73481 | Ratliff City | 842 | $63k | 20.1 mi |
| 73501 | Lawton | 20,397 | $50k | 24.4 mi |
| 73572 | Walters | 3,045 | $57k | 27.8 mi |
| 73520 | Addington | 91 | $40k | 17.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.
Which other ZIP codes use the name Duncan?
2 more ZIP codes carry the postal name Duncan, OK without a residential delivery area: PO boxes at the post office, or a single organization with its own ZIP code. The Census Bureau publishes no figures for them.
| ZIP | County |
|---|---|
| 73534 | Stephens County |
| 73536 | Stephens County |
Source: GeoNames postal codes (CC BY 4.0), downloaded 2026-10-09; a ZIP code with no Census ZCTA has no residential delivery area.