Kathryn Loomis is an Ann Arbor attorney who provides legal editing, research and writing for the Michigan Supreme Court. She has served as vice chair of the Ann Arbor Zoning Board of Appeals and was a member of the Ann Arbor Cool Cities Task Force. Before attending law school, she worked as the Bicycle Program Coordinator for the City of Ann Arbor.
Loomis is married to Democrat Jeff Irwin, her high school sweetheart and a state representative for District 53. They have two children, Sylvia and Mackinac, and live in Ward 3 in the city of Ann Arbor. They hold an annual picnic at their home – called "Burgers on Bellwood" – which draws politicians, political activists, community leaders and neighbors.