Jill Catherine Pipher (born December 14, 1955, Harrisburg, Pennsylvania) is the president of the American Mathematical Society.
She began a two-year term in 2019.
She is the past-president of the Association of Women in Mathematics (AWM, 2011–2013), and she was the first director of the Institute for Computational and Experimental Research in Mathematics (ICERM, 2011–2016), an NSF-funded mathematics institute based in Providence, Rhode Island.