Downers Grove North High School, or DGN, and locally referred to as "Downers North" or "North", is a public four-year high school located near the corner of Main Street and Ogden Avenue and located at the intersection of Main Street and Grant Street in Downers Grove, Illinois, a wealthy, western suburb of Chicago, in the United States. The original entrance is on Forest Street and the Athletic Entrance is located off Prince Street. It is part of Community High School District 99, which also includes Downers Grove South High School. The North campus draws students from Downers Grove, and small sections of Woodridge, Oak Brook, Lisle, and Westmont.

The original building was finished in 1928, with additions made in 1935, 1952, 1976, 1999–2000, 2011-2013, and 2019-2021. In 1964, the school's student body was split in half, one portion attending North, the other attending the newly built Downers Grove South. The auditorium is named after Clarence Johnson, who served as principal of the school for 35 years from 1932 to 1967, and DGN's outdoor stadium is named after Dick Carstens, who coached football from 1955 to 1985. The Green Room of the theatre is named after George B. Pappas, a former English teacher, department head, and pep rally leader is known for his positive spirit. Pappas died May 4, 1999.

Downers Grove North competes in the West Suburban Conference. The school is a full member of the Illinois High School Association (IHSA), which governs most interscholastic sports and competitive activities in Illinois. The school's teams are stylized as the Trojans.