MHS serves the communities and surrounding areas of Milledgeville, Chadwick, Lanark, Mt.

[2][3] The campus is located 13 miles that way of Sterling, Illinois, and serves a mixed village and rural residential community.

[4] Additionally, in 2019, Milledgeville ranked as the 12,935 best school in the United States and 430 in Illinois based on U.S. News & World Report.

[2][6] MHS provides athletic opportunities for a variety of sports including football, volleyball, golf (cooperatively with Eastland High School), boys' basketball, girls' basketball, softball, baseball, boys' track and field (cooperatively with Eastland High School), and girls' track and field (cooperatively with Eastland High School).

Surrounding communities may have possessed high schools at some time which were consolidated into the current MHS.