The Toronto Catholic District School Board (TCDSB, known as English-language Separate District School Board No. 40 prior to 1999) is an English-language public-separate school board for Toronto, Ontario, Canada, headquartered in North York. It is one of the two English boards of education in the City of Toronto, serving the former municipalities of Scarborough, North York, York, East York, Toronto and Etobicoke. With 85,864 students, the TCDSB is one of the largest school boards in Canada, and is the largest publicly funded Catholic school board in the world. Until 1998, it was known as the Metropolitan Separate School Board (MSSB) as an anglophone and francophone separate school district.