 The per capita income for the county was $16,402, the lowest of all 102 counties in Illinois and 57th in the U.S.. About 11.1% of families and 13.6% of the population were below the poverty line, including 19.0% of those under age 18 and 10.7% of those age 65 or over.In its early days Johnson County, being strongly Southern in its culture, was fiercely Democratic.In fact, in the 1860 Presidential election the county gave Illinois native and Northern Democrat Stephen A. Douglas a higher proportion of its votes than any other county in the United States.