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Welcome to Duncan ...

The city of Duncan is located in Stephens County<1> (at the time of its founding, Duncan was located in Indian Territory) and is the County Seat for Stephens County.

While we don't have a date for the founding of Duncan, you might consider that their post office opened in 1884.

From the  Census Estimates for 2019, Duncan has a population of 22,378 people<2> (see below for details).

Duncan is 1,140 feet [347 m] above sea level.<3>.

Time Zone: Duncan lies in the Central Time Zone (CST/CDT) and observes daylight saving time

Area Code for Duncan: 580

The ZIP codes for Duncan: 73533-73534, 73536<4>

Population Details ...

Taken from the 2019 Census Estimates, Duncan had an population of 22,378 people. This is a decrease of 4.49% since the 2010 Census (or a decrease of 0.56% since the 2000 Census).

At the time of the 2010 Census, Duncan had a population of 23,431 people (or 51.95% of the total population of Stephens County). This makes Duncan the county's most populous community.

The population of Duncan represents 0.62% of the total population of Oklahoma (which has 3,751,351 people), making it the state's 17th most populous community.

With a 2010 count of 23,431 people, the population of Duncan increased 4.11% from the 2000 Census (which had a count of 22,505 people).

More information can be found on the Census Page for Duncan.

Communities Also Named Duncan ...

Using our Gazetteer, we found that there are 40 communities that are also named Duncan - they are located in Alabama (2), Arizona, Arkansas, British Columbia, Colorado (2), Connecticut, Illinois (2), Indiana, Iowa, Kansas, Kentucky (2), Michigan (2), Mississippi, Missouri (2), Montana (3), Nebraska, North Carolina (2), Ontario, Oregon, Pennsylvania (2), Quebec, South Carolina, South Dakota, Tennessee, Texas, Virginia (2), Washington, West Virginia and Wyoming.

For more information, see our Tidbits & Trivia Page for Duncan.

Websites for Duncan ...

Official Website: www.cityofduncan.com/

Communities near Duncan ...

We have created a list of 10 communities that are near Duncan.

  • Marlow
    (9 miles [14.5 km] to the north)
  • Comanche
    (9 miles [14.5 km] to the south)
  • Rush Springs
    (18 miles [29 km] to the north)
  • Bray
    (10 miles [16.1 km] to the northeast)
    • Bray is located in Stephens County
    • Jump to our Gazetteer entry for Bray
    • Population from the 2020 Census: 1,178 people
    • Jump to TripAdvisor's Tourism page for Bray <5>
  • Central High
    (10 miles [16.1 km] to the northwest)
    • Central High is located in Stephens County
    • Jump to our Gazetteer entry for Central High
    • Population from the 2020 Census: 1,171 people
  • Empire City
    (6 miles [9.7 km] to the west)
    • Empire City is located in Stephens County
    • Jump to our Gazetteer entry for Empire City
    • Population from the 2020 Census: 889 people
  • Velma
    (17 miles [27.4 km] to the east)
  • Loco
    (19 miles [30.6 km] to the southeast)
    • Loco is located in Stephens County
    • Jump to our Gazetteer entry for Loco
    • Population from the 2020 Census: 118 people
    • Jump to TripAdvisor's Tourism page for Loco <5>
  • Addington
    (18 miles [29 km] to the south)
  • Meridian
    (5 miles [8 km] to the south)
    • Meridian is located in Stephens County
    • Jump to our Gazetteer entry for Meridian

To Help With Your Genealogy Research ...

We have a couple of sections for those tracing their genealogy.

We created a list of cemeteries that are in the area around Duncan. Our list includes the location of those cemeteries and we provide an overhead view. See our Cemetery List for Duncan.

Using the information from an 1895 Atlas, we've created a list of communities that were in the area of Duncan. Our list includes information such as whether the 1895 community had a post office or railroad service. See our List of 1890's Communities around Duncan.

We also have a detailed list of newspapers that have been published in the area around Duncan. Our list includes 11 papers. See our Newspapers Page for Duncan.

TripAdvisor Tourism Pages for Duncan ...

Looking for more information about Duncan? A wonderful source is the TripAdvisor website. We always start with the TripAdvisor Tourism page, where you can read an overview with links that will help you find lodging, restaurants and attractions.

In addition to the Tourism page for Duncan, there are neighboring communities that also have Tourism pages. More information about those communities can be found on our TripAdvisor Page for Duncan.

Adding Duncan to Our Gazetteer ...

We originally found mention of Duncan in both the FIPS-55 and the GNIS. For more information, see the FIPS and GNIS Codes sections on our Miscellaneous Page.

From our notes, the earliest published mention we've found (so far) for Duncan was in the document titled List of Post Offices from Cameron Blevins and Richard Helbock.<6>

From that list, the Duncan post office opened in 1884.

For more details, see References and Mentions for Duncan.

Footnotes ...

<1>If you're interested in how the shape of Oklahoma's counties, including Stephens, have changed over time, we recommend the Atlas of Historical County Boundaries.
<2>Population counts have been provided by the U.S. Census Bureau. For more detail, please visit our Census Page for Duncan.
<3>The elevation is an estimate for the area around Duncan - it will be higher in some places and lower in others.
<4>ZIP Codes have been created by the United States Postal Service (USPS) as a way of grouping addresses to make delivery more efficient. The boundaries of the ZIP Code can be changed, re-assigned, eliminated or overlapped with other ZIP Codes. So keep in mind that any given ZIP Code is only 'loosely' associated with a city (such as Duncan). When looking for a ZIP Code, whether Duncan or elsewhere, it's always best to check the website of the United States Postal Service (USPS).

Our list of ZIP Codes for Duncan includes: 73533 & 73534.
<5>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.
<6>A copy of the Blevins & Helbock Post Office list with background information can be found at:

      https://cblevins.github.io/us-post-offices/data-biography/