All public high schools in Maryland who qualify under the rules and regulations of the Maryland Public Secondary Schools Athletic Association may become members. All 199 public high schools in the State of Maryland currently are members of the Association. A school having become a member of the MPSSAA shall continue as a member until such time as it withdraws its membership.
All non-member schools wishing to compete against MPSSAA member schools must complete, submit for approval, and adhere to the Maryland State Department of Education "Standards of Competition" and be listed as an approved non-member school. Additional information on the "Standards of Competition" can be found on the MPSSAA website under "Sanctioning".