Duncan, Oklahoma

Duncan population, 2020 to 2024

Duncan added 521 residents from July 2020 to July 2024, a change of +2.3%. In the latest year it moved by -24. Among 75 Oklahoma places of 5,000 or more, that growth ranks 37th; the median place changed by +2.2%. The median place of 5,000+ in Oklahoma has 12,358 people, so Duncan is 1.9 times that size.

Duncan covers 42.94 square miles of land and 4.88 of water, for 540 people per square mile of land. The median Oklahoma place of 5,000+ has 896, so Duncan is less dense than the typical town.

What county Duncan is in

All of Duncan's residents live in Stephens County, which had 44,075 residents in 2024. Duncan holds 52.6% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Duncan

2 ZIP Code Tabulation Areas (ZCTAs) overlap Duncan by at least 10% of the ZCTA's or the city's land: 73055, 73533. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a city that annexed land after 2020 may reach into ZIP codes not listed here.

Where Duncan is

The Census internal point of Duncan is at 34.481600, -97.960500. Oklahoma City, the capital, is 74.5 miles NNE in a straight line. The nearest larger place is Lawton, OK (90,027 people), 27.8 miles away. The nearest city of 100,000 or more is Wichita Falls, TX, 51.2 miles away.

Daylight in Duncan

At 34.48° N, Duncan gets about 14 h 28 min of daylight around the June solstice and 9 h 51 min around the December solstice, a swing of 4 h 37 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Duncan

The eight nearest incorporated places of 1,000+ in Oklahoma, measured between internal points. The closest is Comanche, 8.3 miles away, with 1,397 people.