 The per capita income for the county was $25,392.About 5.2% of families and 7.8% of the population were below the poverty line, including 9.2% of those under age 18 and 5.7% of those age 65 or over.As part of German Catholic Central Illinois, nineteenth-century Clinton County was opposed to the “Yankee” Civil War and the Northern Illinois residents who supported it and the Republican Party.