Duncan, OK Profile: Facts, Map & Data


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Duncan, Oklahoma - Basic Facts

The City of Duncan had a population of 23,804 as of July 1, 2016.

The primary coordinate point for Duncan is located at latitude 34.5061 and longitude -98.0054 in Stephens County. The formal boundaries for the City of Duncan (see map below) encompass a land area of 42.87 sq. miles and a water area of 4.87 sq. miles. Stephens County is in the Central time zone (GMT -6). The elevation is 1,125 feet.

The City of Duncan (GNIS ID: 2410368) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

Oklahoma is one of 20 states where Census County Divisions (CCDs) are used for statistical tracking of subdivisions within each county. The City of Duncan is located within Duncan Division of Stephens County.

Beneath the boundary map are tables with Duncan population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2016.

Neighborhood Data

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City of Duncan, OK Boundary Map

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Boundary Maps: Duncan Division | Stephens County | Oklahoma Counties

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Duncan, OK Data & Demographics (As of July 1, 2016)


Total Population 23,804
Population in Households 23,395
Population in Familes 18,977
Population in Group Qrtrs 409
Population Density1 555
Diversity Index2 48


Total Households 9,710
Average Household Size 2.41
Family Households 6,417
Average Family Size 3


Total Housing Units 11,235 (100%)
Owner Occupied HU 6,377 (56.8%)
Renter Occupied HU 3,333 (29.7%)
Vacant Housing Units 1,525 (13.6%)
Median Home Value $109,914
Average Home Value $133,898


Median Household Income $42,123
Average Household Income $59,329
Per Capita Income $24,210
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.27% 0.14%
Households 0.08% 0.03%
Families 0.14% -0.03%
Median Household Income   2.21%
Per Capita Income   1.24%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.

Duncan, OK - Peer Comparisons by Rank and Percentile

The table below compares Duncan to the other 731 incorporated cities, towns and CDPs in Oklahoma by rank and percentile using July 1, 2016 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 19 98th
Population Density1 # 346 53rd
Diversity Index2 # 381 47th
Median Household Income # 316 57th
Per Capita Income # 223 70th

Additional comparisons and rankings can be made with a VERY EASY TO USE Oklahoma Census Data Comparison Tool.

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