The northern boundary for Calvert Middle School is the southern boundary of Plum Point Middle School.

The southern boundary begins at the Patuxent River and moves up Island Creek in a north and east direction to the intersection of Ross Road and Mackall Road. It continues to the intersection of Ball Rd. and Rte. 4. It moves in an easterly direction to the Bay, north of Calvert Beach Rd.

The western boundary for Calvert Middle is the Patuxent River and the eastern boundary is the Chesapeake Bay.

The following communities and/or roads are included in Calvert Middle School: Hallowing Point Rd., Dares Beach Rd.—from Rte. 4 to Clay Hammond Rd.- Prince Frederick Towne Center, Dorsey Rd., Central Village, Silverwood, Sixes Rd., German Chapel Rd., Adelina Rd., Grays Rd., Parkers Creek Rd., Scientist Cliffs, Western Shores, Kenwood Beach, Broomes Island Rd., Ball Rd.