 About 17.6% of families and 22.7% of the population were below the poverty line, including 33.6% of those under age 18 and 18.0% of those age 65 or over.In the South Carolina House of Representatives, Chesterfield County is located in South Carolina's 53rd House district and is represented by Republican Ritchie Yow.In the South Carolina Senate, Chesterfield is located in Senate district 27 and represented by Democrat, and former 2010 candidate for governor, Vincent Sheheen.