Bonnie Koloc (born February 6, 1946) is an American folk music singer-songwriter, actress, and artist. She was considered one of the three main Illinois-based folk singers in the 1970s, along with Steve Goodman and John Prine forming the "trinity of the Chicago folk scene". Her music continues to be recognized and valued by historians of Chicago folk music as well as by her long standing fan base in that area. But her voice, which may be considered crystalline in its clarity, is remembered as well.