1. Diane Hendricks
Age: 72 Residence: Afton, Wisconsin Self-made Score: 9
The nation’s wealthiest self-made woman for the second year in a row added $2.1 billion to her net worth, thanks to record sales of $10.5 billion (up $1.2 billion) at her roofing giant, ABC Supply. Hendricks once worked in a pen factory, then sold custom-built homes and renovated rental apartments. She and her husband Ken opened their first store in Beloit, Wisconsin, in 1982; it now has 780 U.S. locations. Since Ken died in 2007, Hendricks has presided over the business, during which time sales have quadrupled.