Duncan city, Oklahoma
Official LSAD Designation: Duncan city • Census GEOID: 4021900
• Stephens County
Duncan city is an incorporated city in Stephens County, Oklahoma. According to official records from the Census (2025), Duncan city had an estimated population of 23,238 residents. Official Census Bureau geographic records classify this community under LSAD designation Duncan city (GEOID 4021900).
Local Government Administration U.S. Census Bureau GMAF
City Of Duncan
Municipal
Official Title:
City Manager
Address:
720 W WILLOW AVE, DUNCAN OK 73533-4952
County Of Stephens
County
Official Title:
County Clerk
Address:
101 S 11TH ST, RM 207, DUNCAN OK 73533-4758
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 23,238 | 2025 |
| Median Household Income | $58,054 | 2020-2024 |
| Median Home Value | $131,500 | 2020-2024 |
| Land Area | 42.87 sq mi | Gazetteer (2026) |
| Civic & Public Services | Hospitals, Libraries, Colleges | CMS / IMLS / IPEDS |
| Schools & Districts | NCES Directory Listings | Provided by k12guides.com |
| Nearby Airports | Landing Facilities | Provided by airport-data.com |
| Climate & Weather | NOAA 30-Year Normals | 1991–2020 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).