Thornburg, IA Profile: Facts, Map & Data


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Thornburg, Iowa - Basic Facts

The City of Thornburg had a population of 75 as of July 1, 2015. Thornburg ranks in the lower quartile for Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Iowa. See peer rankings below.

The primary coordinate point for Thornburg is located at latitude 41.4554 and longitude -92.3328 in Keokuk County. The formal boundaries for the City of Thornburg (see map below) encompass a land area of 0.2 sq. miles and a water area of 0 sq. miles. Keokuk County is in the Central time zone (GMT -6). The elevation is 876 feet.

The City of Thornburg (GNIS ID: 2397020) 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 Thornburg is located within Township of Prairie, a minor civil division (MCD) of Keokuk County.

Beneath the boundary map are tables with Thornburg population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2015.

Neighborhood Data

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City of Thornburg, IA Boundary Map

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Boundary Maps: Township of Prairie | Keokuk County | Iowa Counties

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Thornburg, IA Data & Demographics (As of July 1, 2015)


Total Population 75
Population in Households 75
Population in Familes 63
Population in Group Qrtrs 0
Population Density1 381
Diversity Index2 3


Total Households 31
Average Household Size 2.42
Family Households 22
Average Family Size 3


Total Housing Units 32 (100%)
Owner Occupied HU 25 (78.1%)
Renter Occupied HU 5 (15.6%)
Vacant Housing Units 1 ( 3.1%)
Median Home Value $77,500
Average Home Value $85,000


Median Household Income $47,056
Average Household Income $61,221
Per Capita Income $25,402
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 2.17% 0.79%
Households 2.67% 0.64%
Families 1.83% 0.89%
Median Household Income   3.63%
Per Capita Income   2.57%
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.


Thornburg, IA - Peer Comparisons by Rank and Percentile

The table below compares Thornburg to the other 1,009 incorporated cities, towns and CDPs in Iowa by rank and percentile using July 1, 2015 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 # 912 10th
Population Density1 # 722 29th
Diversity Index2 # 962 5th
Median Household Income # 703 30th
Per Capita Income # 570 44th

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