 About 7.70% of families and 11.10% of the population were below the poverty line, including 10.70% of those under age 18 and 14.80% of those age 65 or over.Pennington County has a fairly balanced voting record but has tended to vote Republican in recent decades.In 60% of national elections since 1980 the county selected the Republican Party candidate (as of 2016).