Mill Creek High School is a high school in Hoschton, Georgia. It serves the unincorporated area of Hamilton Mill, Gwinnett County, a suburb of Atlanta, as well as serves unincorporated areas (not city limits) such as zip codes 30548, 30019, 30542, and 30519. It has 3,703 students, and the most recent attendance counts have named it the largest school in Georgia. It is fed from Frank N. Osborne Middle School and Glenn C.