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The 2009 St. Clair County, MI, population is 170,119. There are 237 people per square mile (population density).
The median age is 37.2. The US median is 37.6. 60.51% of people in St. Clair County, MI, are married. 10.18% are divorced.
The average household size is 2.56 people. 25.99% of people are married, with children. 8.57% have children, but are single.
94.47% of people are white, 2.02% are black, 0.49% are asian, 0.51% are native american, and 2.20% claim 'Other'.
2.32% of the people in St. Clair County, MI, claim hispanic ethnicity (meaning 97.68% are non-hispanic).
St._Clair, MI People data
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