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As of the 2010 United States Census, Coal City, located in the Prairie State, had a total population of 5,729 people.
From a total population of 5,729, Coal City has a median age of 35.5. The average age of males, in Coal City, is 35 while the average age of females is 36.4. When you compare this to median age of Illinois, Coal City is 1.5 years younger.
The median income of individuals, in Coal City, is $28,133 while the average household income is $59,479. When comparing the median income of people living in Coal City to the rest of Illinois, the average income in Coal City is $1,886 less.