Glenbrook North High School is a public high school in Northbrook, Illinois, a north suburb of Chicago, United States. It was established in 1953 and is part of the Northfield Township High School District 225. In 2022, it was ranked the 48th-best public high school in the United States by Niche. Feeder schools that attend GBN are Wood Oaks, Northbrook Junior High, Field, and Maple. GBN serves most of Northbrook, some unincorporated portions of Cook County, and a small section of Glenview.