A 15-year-old gunman murders four students and injures seven people, including a teacher, in a mass shooting at Oxford High School in Oxford Township, Michigan.

On November 30, 2021, a school shooting occurred at Oxford High School in Oxford Township, Michigan, United States. 15-year-old Ethan Robert Crumbley opened fire with a 9mm semi-automatic handgun, killing four students and injuring seven people, including a teacher. Authorities arrested and charged Crumbley as an adult for 24 crimes, including murder and terrorism. Crumbley pleaded guilty to all of the charges in October 2022 and was sentenced in December 2023 to life imprisonment without the possibility of parole, plus an additional 24 years.

Oxford High School is a coed public secondary institution located in Oxford Township, Michigan, United States, with an Oxford postal address. Part of the Oxford Community Schools district, it is within one of the largest school districts, geographically, in southeastern lower Michigan.

Oxford Township, officially the Charter Township of Oxford, is a charter township in Oakland County in the U.S. state of Michigan. The population was 22,419 at the 2020 census.

November 30 is the 334th day of the year in the Gregorian calendar; 31 days remain until the end of the year.