Spencer, IA Profile: Facts, Map & Data


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Spencer, Iowa - Basic Facts

The City of Spencer is an incorporated place (Class Code P1) located in Clay County at latitude 43.147 and longitude -95.1527. Clay County is in the Central time zone (GMT -6). The elevation is 1,319 feet.

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

The P1 Census Class Code for Spencer 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 Spencer (see map below) encompass a land area of 10.83 sq. miles and a water area of 0.16 sq. miles.

City of Spencer, IA Boundary Map


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Spencer, IA Data & Demographics (As of July 1, 2014)


Total Population 11,306
Population in Households 11,065
Population in Familes 8,470
Population in Group Qrtrs 241
Population Density1 1,027
Diversity Index2 17


Total Households 5,100
Average Household Size 2.17
Family Households 3,039
Average Family Size 3


Total Housing Units 5,531 (100%)
Owner Occupied HU 3,338 (60.4%)
Renter Occupied HU 1,763 (31.9%)
Vacant Housing Units 431 ( 7.8%)
Median Home Value $128,713
Average Home Value $150,450


Median Household Income $45,568
Average Household Income $56,674
Per Capita Income $25,664
  (Compound Annual Growth Rates)


2010-2014 2014-2019
Population 0.15% -0.06%
Households 0.38% 0.05%
Families 0.23% -0.13%
Median Household Income   3.05%
Per Capita Income   3.39%
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.


Spencer, IA - Peer Comparisons by Rank and Percentile

The table below compares Spencer 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 # 33 97th
Population Density1 # 286 72nd
Diversity Index2 # 174 83rd
Median Household Income # 761 25th
Per Capita Income # 505 50th

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