Duncombe, IA Profile: Facts, Map & Data


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Duncombe, Iowa - Basic Facts

The City of Duncombe had a population of 341 as of July 1, 2016. Duncombe ranks in the lower quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in Iowa. See peer rankings below.

The primary coordinate point for Duncombe is located at latitude 42.4695 and longitude -93.9962 in Webster County. The formal boundaries for the City of Duncombe (see map below) encompass a land area of 2.01 sq. miles and a water area of 0 sq. miles. Webster County is in the Central time zone (GMT -6). The elevation is 1,109 feet.

The City of Duncombe (GNIS ID: 2394571) 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.

The City of Duncombe is located within Township of Washington, a minor civil division (MCD) of Webster County.

Beneath the boundary map are tables with Duncombe 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 Duncombe, IA Boundary Map

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Boundary Maps: Township of Washington | Webster County | Iowa Counties

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Duncombe, IA Data & Demographics (As of July 1, 2016)


Total Population 341
Population in Households 341
Population in Familes 271
Population in Group Qrtrs 0
Population Density1 170
Diversity Index2 9


Total Households 152
Average Household Size 2.24
Family Households 102
Average Family Size 3


Total Housing Units 193 (100%)
Owner Occupied HU 121 (62.7%)
Renter Occupied HU 31 (16.1%)
Vacant Housing Units 41 (21.2%)
Median Home Value $92,949
Average Home Value $122,934


Median Household Income $50,218
Average Household Income $54,463
Per Capita Income $23,605
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population -2.91% -1.39%
Households -2.67% -1.35%
Families -1.06% -1.41%
Median Household Income   2.81%
Per Capita Income   2.42%
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.

Duncombe, IA - Peer Comparisons by Rank and Percentile

The table below compares Duncombe to the other 1,009 incorporated cities, towns and CDPs in Iowa 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 # 562 44th
Population Density1 # 909 10th
Diversity Index2 # 477 53rd
Median Household Income # 607 40th
Per Capita Income # 808 20th

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