Duncombe, IA Profile: Facts, Map & Data

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Duncombe, Iowa - Basic Facts

The City of Duncombe is an incorporated place (Class Code P1) located in Webster County at latitude 42.4695 and longitude -93.9962. Webster County is in the Central time zone (GMT -6). The elevation is 1,109 feet.

The formal official name is the City of Duncombe, but most people and references simply refer to it as Duncombe, Iowa.

The P1 Census Class Code for Duncombe indicates a populated place that is also an incorporated place with the same name and the same census code. The Incorporated Place has a Functional Status Code "A" which identifies an active government providing primary general-purpose functions.

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.

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, 2014)


Total Population 335
Population in Households 335
Population in Familes 266
Population in Group Qrtrs 0
Population Density1 170
Diversity Index2 8


Total Households 149
Average Household Size 2.25
Family Households 99
Average Family Size 3


Total Housing Units 193 (100%)
Owner Occupied HU 119 (61.7%)
Renter Occupied HU 30 (15.5%)
Vacant Housing Units 44 (22.8%)
Median Home Value $93,452
Average Home Value $110,714


Median Household Income $48,823
Average Household Income $53,451
Per Capita Income $22,965
  (Compound Annual Growth Rates)


2010-2014 2014-2019
Population -4.64% -1.92%
Households -4.35% -1.67%
Families -2.24% -1.89%
Median Household Income   1.91%
Per Capita Income   2.74%
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, 2014 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 # 567 44th
Population Density1 # 910 10th
Diversity Index2 # 522 49th
Median Household Income # 687 32nd
Per Capita Income # 777 23rd

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