The northern boundary for Mill Creek Middle is the southern boundary for Southern Middle School.

All area south of this line in Calvert County will attend Mill Creek Middle School.

The following communities and/or roads are included in Mill Creek Middle School: Sollers Wharf Rd., Mill Bridge Rd., Coster Rd., Rousby Hall Rd., Dowell Rd., Olivet Rd., Solomons, Drum Point and the southern part of Chesapeake Ranch Estates.