Ionia, MI Profile: Facts, Map & Data


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Ionia, Michigan - Basic Facts

The City of Ionia had a population of 11,540 as of July 1, 2017. Ionia ranks in the upper quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Michigan. See peer rankings below.

The primary coordinate point for Ionia is located at latitude 42.9768 and longitude -85.0746 in Ionia County. The formal boundaries for the City of Ionia (see map below) encompass a land area of 5.35 sq. miles and a water area of 0.13 sq. miles. Ionia County is in the Eastern time zone (GMT -5). The elevation is 718 feet.

The City of Ionia (GNIS ID: 1626521) has a C5 Census Class Code which indicates an active incorporated place that is independent of any county subdivision and serves as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

Beneath the boundary map are tables with Ionia population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

Alternate Unofficial Names for Ionia: Ionia Centre.

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City of Ionia, MI Boundary Map

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Ionia, MI Data & Demographics (As of July 1, 2017)


Total Population 11,540
Daytime Population: Workers 6,626
Daytime Population: Residents 3,933
Total Daytime Population (TDP) 10,559
Ratio TDP/Total Population1 0.91
Population in Households 6,749
Population in Familes 5,290
Population in Group Qrtrs 4,791
Population Density2 2,158
Diversity Index3 52


Median Household Income $37,196
Average Household Income $47,497
Per Capita Income $13,578


Total Housing Units 2,843 (100%)
Owner Occupied HU 1,554 (54.7%)
Renter Occupied HU 940 (33.1%)
Vacant Housing Units 349 (12.3%)
Median Home Value $91,715
Average Home Value $121,599


Total Households 2,494
Average Household Size 2.71
Family Households 1,619
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  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.


2010-2017 2017-2022
Population 0.18% 0.26%
Households 0.37% 0.45%
Families 0.87% 0.33%
Median Household Income   0.54%
Per Capita Income   1.4%

Ionia, MI - Peer Comparisons by Rank and Percentile

The table below compares Ionia to the other 692 incorporated cities, towns and CDPs in Michigan by rank and percentile using July 1, 2017 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 # 88 87th
Population Density # 124 82nd
Diversity Index # 53 92nd
Median Household Income # 578 17th
Per Capita Income # 685 1st

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

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