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As of the 2010 United States Census, Oblong, located in the Prairie State, had a total population of 1,569 people.
From a total population of 1,569, Oblong has a median age of 39. The average age of males, in Oblong, is 33.1 while the average age of females is 44.6. When you compare this to median age of Illinois, Oblong is 2.0 years older.
The median income of individuals, in Oblong, is $21,861 while the average household income is $40,000. When comparing the median income of people living in Oblong to the rest of Illinois, the average income in Oblong is $8,158 less.