Trafalgar, declared in the "public interest" by the Quebec Ministry of Education, has accreditation from the Canadian Educational Standards Institute (CESI), and is a member in good standing of the following organizations: Canadian Association of Independent Schools (CAIS), National Coalition of Girls Schools (NCGS), and the Quebec Association of Independent Schools (QAIS).

As Montreal's oldest English language all-girls school, we are proud of our membership in the Quebec Anglophone Heritage Network.