Cedar Grove High School (CGHS) is located at 2360 River Road, Ellenwood, Georgia, United States in suburban unincorporated south DeKalb County.

Enrollment has fluctuated over the years with the development of the surrounding area.

In 1993, with the resurgence of housing developments in the area, enrollment began to increase.

A teacher computer in each classroom is networked with internet access.

Since the inception of the Bill Gates Millennium Scholars Program, Cedar Grove High has had winners: two in the first year, two in the second year, and one in the third.