Grinnell, IA Profile: Facts & Data


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Grinnell, Iowa - Basic Facts

The City of Grinnell had a population of 9,245 as of July 1, 2018. 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.

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  1. Grinnell 2018 Demographic Data
  2. Growth Rates for Grinnell (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Iowa Research Tools (Easy Tools & Current Data)
  3. Iowa Data Comparison Tool - 2018 Demographics

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Boundary Maps, Demographic Data, School Zones Review maps and data for the neighborhood, city, county, ZIP Code, and school zone. July 1, 2018, data includes home values, household income, percentage of homes owned, rented or vacant, etc.


Grinnell, IA Data & Demographics (As of July 1, 2018)


Total Population 9,245
Population in Households 7,758
Population in Familes 5,639
Population in Group Qrtrs 1,487
Population Density2 1,679
Diversity Index3 28


Median Household Income $56,027
Average Household Income $75,576
Per Capita Income $30,471


Total Housing Units 3,940 (100%)
Owner Occupied HU 2,037 (51.7%)
Renter Occupied HU 1,491 (37.8%)
Vacant Housing Units 412 (10.5%)
Median Home Value $146,318
Average Home Value $182,777


Total Households 3,528
Average Household Size 2.2
Family Households 1,993
Average Family Size 3
  1. Demographics are point estimates for July 1st of the current year and each for the forecast years. See References for more information.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood 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.


2010-2018 2018-2023
Population 0.04% 0.12%
Households -0.13% 0.06%
Families -0.2% -0.05%
Median Household Income   0.16%
Per Capita Income   0.51%

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, 2018 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 Density # 57 94th
Diversity Index # 87 91st
Median Household Income # 485 52nd
Per Capita Income # 368 64th

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

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