ZIP code · Duncan · Oklahoma · United States

ZIP code 73533 — Duncan

ZIP code 73533 serves Duncan, Oklahoma.

Postal code
73533
Single source Value from one source, not cross-checked.
City
Duncan
County
Stephens FIPS 40137
State
Oklahoma
Country
United States
Coordinates
34.5073, -97.9403 — precision precise (locality)
View on OpenStreetMap
Population
27,935 (ZCTA, ACS 5-year)
Population density
85 / sq mi
Land area
329.5 sq mi (853.5 km²) (ZCTA, ACS 5-year)
Median household income
$59,341
Per-capita income
$34,422
Median age
39.8
Households
11,116
Housing units
12,969
Median home value
$137,300
Median gross rent
$877 / month
Congressional district
OK-4 (119th Congress)
USDA hardiness zone
8a (10 to 15 °F)
Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
Time zone
America/Chicago (UTC−6 / UTC−5 DST)
Area code
580
Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.

Climate — monthly normals

Warmest month Jul (avg high 94°F), coldest Jan (avg low 28°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F525765738189949386766454
Avg low °F283241495968727163513931
Precip in1.51.82.83.55.64.52.62.93.83.92.32.0

NOAA 1991–2020 climate normals from the nearest station: DUNCAN (1.2 mi) · NOAA NCEI

Places in ZIP 73533

Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology

About this page

US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.

GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page