St. Clair County MI Information


St. Clair County Subdivisions

St. Clair County MI Data & Demographics (As of July 1, 2016)


Total Population 159,685
Population in Households 157,686
Population in Familes 129,265
Population in Group Qrtrs 1,999
Population Density1 221
Diversity Index2 19


Total Households 63,261
Average Household Size 2.49
Family Households 43,377
Average Family Size 3


Total Housing Units 71,822 (100%)
Owner Occupied HU 48,268 (67.2%)
Renter Occupied HU 14,993 (20.9%)
Vacant Housing Units 8,561 (11.9%)
Median Home Value $144,870
Average Home Value $178,676


Median Household Income $50,573
Average Household Income $62,839
Per Capita Income $25,228
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population -0.33% -0.25%
Households -0.15% -0.13%
Families -0.31% -0.24%
Median Household Income   1.75%
Per Capita Income   1.97%
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.


St. Clair County MI - Peer Comparisons by Rank and Percentile

The table below compares St. Clair County to the other 83 counties and county equivalents in Michigan 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 84th
Population Density1 # 17 81st
Diversity Index2 # 40 53rd
Median Household Income # 19 78th
Per Capita Income # 24 72nd

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