Grinnell, IA Profile: Facts, Map & Data


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Grinnell, Iowa - Basic Facts

The City of Grinnell had a population of 9,059 as of July 1, 2016. Grinnell 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 Grinnell is located at latitude 41.7367 and longitude -92.7249 in Poweshiek County. The formal boundaries for the City of Grinnell (see map below) encompass a land area of 5.51 sq. miles and a water area of 0.04 sq. miles. Poweshiek County is in the Central time zone (GMT -6). The elevation is 1,014 feet.

The City of Grinnell (GNIS ID: 467979) has a C2 Census Class Code which indicates an active incorporated place legally coextensive with a county subdivision but treated as independent of any county subdivision. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

The City of Grinnell is located within , a minor civil division (MCD) of Poweshiek County.

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

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


Total Population 9,059
Population in Households 7,604
Population in Familes 5,609
Population in Group Qrtrs 1,455
Population Density1 1,646
Diversity Index2 26


Total Households 3,477
Average Household Size 2.19
Family Households 1,975
Average Family Size 3


Total Housing Units 3,853 (100%)
Owner Occupied HU 2,207 (57.3%)
Renter Occupied HU 1,270 (33.0%)
Vacant Housing Units 376 ( 9.8%)
Median Home Value $147,960
Average Home Value $174,400


Median Household Income $52,859
Average Household Income $68,739
Per Capita Income $28,011
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population -0.28% -0.15%
Households -0.41% -0.25%
Families -0.41% -0.32%
Median Household Income   2.01%
Per Capita Income   1.45%
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.

Grinnell, IA - Peer Comparisons by Rank and Percentile

The table below compares Grinnell 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 # 45 96th
Population Density1 # 62 94th
Diversity Index2 # 91 91st
Median Household Income # 500 51st
Per Capita Income # 399 61st

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

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