 About 6.8% of families and 10.4% of the population were below the poverty line, including 16.9% of those under age 18 and 8.7% of those age 65 or over.Henry County's political history is fairly typical of many Yankee-settled rural counties in Illinois.After being largely Democratic in its first few elections, the county turned powerfully Republican for the 110 years following the formation of that party.