 The per capita income for the county was $21,291.About 4.5% of families and 8.2% of the population were below the poverty line, including 7.4% of those under age 18 and 12.8% of those age 65 or over.Aurora County at one time favoured the Democratic Party and was one of just 130 counties nationwide to be won by South Dakota favorite son George McGovern, who grew up in adjacent Davison County.