Duncan Population 2026
Duncan has a population of 23,231, making it the #2042 biggest city in 🇺🇸 United States, located in Oklahoma. It is about 379× smaller than New York City, the country's biggest city.
Population (city proper)
23,231
Rank in United States
#2042
Coordinates
34.50°N, 97.96°W
~342 m elevation · America/Chicago
Distance to capital (Washington)
1,923 km
1,194 miles, straight line
Other big cities in Oklahoma
| City | Population | Rank in United States |
|---|---|---|
| Oklahoma City | 681,054 | #22 |
| Tulsa | 413,066 | #47 |
| Norman | 128,026 | #227 |
| Broken Arrow | 106,563 | #298 |
| Lawton | 96,655 | #340 |
| Edmond | 90,092 | #378 |
| Moore | 60,451 | #675 |
| Midwest City | 57,249 | #730 |
Cities near Duncan
FAQ
What is the population of Duncan?
Duncan has a population of 23,231 (city proper, latest official figure via GeoNames), making it the #2042 biggest city in United States.
What state is Duncan in?
Duncan is located in Oklahoma, United States.
Is Duncan the capital of United States?
No, the capital of United States is Washington D.C., about 1,923 km away.
Sources & notes
Population refers to the city proper (municipal boundaries), not the metropolitan area. Source: GeoNames (CC BY 4.0), retrieved 2026-07-07. Country data: UN World Population Prospects 2024.
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