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Summary for Duncan

About Duncan (Click for our profile page)

Located in: Stephens County (see below)

Time Zone: Duncan lies in the Central Time Zone (CST/CDT)

Telephone Area Code: 580

ZIP Codes: 73533-73534, 73536<1>

Elevation: 1,140 feet [347.47 m] above sea level<2>

From the 2010 US Census (For more detail, see our Census Page for Duncan)

Population

Year	Population
2019 Est:<3>	22,378 (4.49% decrease since 2010)
2010:	23,431 (4.11% increase since 2000)
2000:	22,505

Total Area:<4> 47.98 sq. miles [124.3 km²] - of which 10.15% is water (4.87 sq. miles [12.6 km²])

Housing Units:<5> 11,064

Official Website: www.cityofduncan.com/

GPS Coordinates (Latitude/Longitude)<6>

For the purpose of mapping and calculating distances, we have chosen the following reference point for Duncan:

Lat: 34.504900° (or 34°30'17" N)

Lon: -97.955000° (or -97°57'17" W)

USGS Topo Map: Nellie<7>

Federal GNIS/FIPS Codes for Duncan

GNIS ID: 2410368

FIPS State / Place Code: 40 / 21900

(For more about Federal Codes, see our Misc Page for Duncan)

About Stephens County

The city of Duncan is the County Seat for {Stephens County}.

From the 2010 US Census (For more detail, see our Census Page for Stephens)

Population

Year	Population
2019 Est:	43,143 (4.34% decrease since 2010)
2010	45,100 (4.44% increase since 2000)
2000:	43,182

Total Area: 891 sq. miles [2,308.6 km²] - of which 2.37% is water (21.12 sq. miles [54.7 km²])

Housing Units: 20,658

Federal GNIS/FIPS Codes for Stephens

GNIS ID: 1101856

FIPS State / County Code: 40 / 137

(For more about Federal Codes, see our Misc Page for Duncan)

About Oklahoma

From the US Census

Population

Year	Population
2019 Est:	3,960,676 (5.58% increase since 2010)
2010:	3,751,351 (8.71% increase since 2000)
2000:	3,450,654

Websites for State of Oklahoma

Official Website: https://www.ok.gov/

Tourism: https://www.travelok.com/

Parks: https://www.travelok.com/state-parks

Fishing: https://www.travelok.com/fishing-trail

Hunting: https://www.travelok.com/hunting

Federal GNIS/FIPS Codes for State of Oklahoma

GNIS ID: 1102857

FIPS State: 40

(For more about Federal Codes, see our Misc Page for Duncan)

Footnotes ...

<1>	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.
<2>	The elevation is an estimate for the area around Duncan - it will be higher in some places and lower in others.
<3>	Every year, the US Census Bureau creates a population estimate for the preceeding year. Keep in mind that this value is an estimate and not an actual count. The most recent Census estimate is for the year 2019.
<4>	The area value has been supplied by the US Census Bureau and it can be different than the geographic boundaries of Duncan. The value given by the Census Bureau reflects their statistical (or sampling) requirements. For example, if there is a cluster of people living just outside of the community's official boundary, the Census-defined area might be expanded to include that group.
<5>	A Housing Unit is a broad term for those places where people live (whether occupied or temporarily vacant), such as a house, an apartment, a mobile home, or an area that is considered as a separate living quarter. Separate living quarters (consisting of one or more rooms) are considered to be those places where people live, sleep and eat separately from others and that have access to the outside (either directly or by a shared hallway).
<6>	Longitude & latitude values may not be the geographic center of Duncan, rather it may be a prominent intersection or the center of population, etc. It will vary depending on the source.
<7>	Name of the USGS 7.5 Minute topographic map which includes Duncan.