Marion, IA Profile: Facts, Map & Data


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Marion, Iowa - Basic Facts

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The City of Marion had a population of 37,277 as of July 1, 2016. Marion ranks in the upper quartile for Population Density and 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 Marion is located at latitude 42.0446 and longitude -91.5862 in Linn County. The formal boundaries for the City of Marion (see map below) encompass a land area of 16.05 sq. miles and a water area of 0.01 sq. miles. Linn County is in the Central time zone (GMT -6). The elevation is 846 feet.

The City of Marion (GNIS ID: 2395011) 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 Marion is located within Township of Marion, a minor civil division (MCD) of Linn County.

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

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Boundary Maps: Township of Marion | Linn County | Iowa Counties

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


Total Population 37,277
Population in Households 36,920
Population in Familes 29,996
Population in Group Qrtrs 357
Population Density1 2,323
Diversity Index2 18


Total Households 14,944
Average Household Size 2.47
Family Households 9,866
Average Family Size 3


Total Housing Units 15,909 (100%)
Owner Occupied HU 11,246 (70.7%)
Renter Occupied HU 3,698 (23.2%)
Vacant Housing Units 965 ( 6.1%)
Median Home Value $176,061
Average Home Value $210,354


Median Household Income $65,486
Average Household Income $83,885
Per Capita Income $33,780
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 1.12% 0.97%
Households 0.93% 0.85%
Families 0.94% 0.8%
Median Household Income   3.38%
Per Capita Income   2.02%
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.

Marion, IA - Peer Comparisons by Rank and Percentile

The table below compares Marion 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 # 14 99th
Population Density1 # 14 99th
Diversity Index2 # 177 83rd
Median Household Income # 122 88th
Per Capita Income # 110 89th

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

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