Willows Academy is an all-girls private school in Des Plaines, Illinois, United States, with its religious education under the direction of Opus Dei. The school is divided into the Middle School (6-8) and High School (9-12). There are approximately 250 students enrolled in grades 6-12, with about 25 students per middle school class and 40 students per high school class. The original school was located on Vernon Avenue in Glencoe, IL. The second location was in Niles, IL.