Kathleen Ann Ryg (born August 6, 1952) is a former Democratic member of the Illinois House of Representatives, representing the 59th district from 2003 until 2009. The district includes all or part of Vernon Hills, Prairie View, Long Grove, Buffalo Grove, Mettawa, Lake Forest, Lake Bluff, Green Oaks, Gurnee, Waukegan, Indian Creek, Lincolnshire, Mundelein, North Chicago, Park City, Riverwoods, Wheeling, and Northbrook. Ryg resigned to rejoin the private sector on August 31, 2009. She was replaced by Carol Sente.