Below is a listing of the recognized MASC Regions.  When available, a link to a regional website is provided.

• ACASC Allegany County Association of Student Councils
• ASCBC Associated Student Congress of Baltimore City (Twitter ASCBC)
• BCJC Baltimore County Junior Councils
• BCSC Baltimore County Student Councils
• CASC Calvert Association of Student Councils
• CCASC Charles County Association of Student Councils
• CCCSC Cecil County Council of Student Councils
• CCSGA Carroll County Student Government Association
• CRASC (Anne Arundel County) Chesapeake Region Association of Student Councils
• FCASC Frederick County Association of Student Councils
• GCASC Garrett County Association of Student Councils
• HCRASC Harford County Regional Association of Student Councils
• HCASC Howard County Association of Student Councils
• KCASG Kent County Association of Student Governments
• MCJC Montgomery County Junior Councils (middle school)
• MCR Montgomery County Region of the MD Assoc. of Student Councils (high schools)
• PGRASG Prince George’s Regional Association of Student Governments
• SMASC  St. Mary’s Association of Student Councils
• WCASC  Washington County Association of Student Councils