The Simcoe Muskoka Catholic District School Board (SMCDSB, known as English-language Separate District School Board No. 44 prior to 1999^[1]) administers and governs separate school Catholic education from kindergarten through grade 12 in Simcoe County and the District of Muskoka, in Ontario, Canada. As of 2018-2019, the school board has 41 elementary and 9 secondary schools located in communities throughout Simcoe County and the District of Muskoka.^[2] Its boundaries are Highway 9 in the south to Huntsville in the north, and from Collingwood in the west to Brechin on the east side of Lake Simcoe.

The board was originally known as Simcoe Muskoka Roman Catholic Separate School Board (SMRCSSB) and operated anglophone and francophone schools.

The following is a list of the secondary schools managed by the SMCDSB:^[2]

The following is a list of the elementary schools managed by the SMCDSB:^[2]

• Archdiocese of Toronto
• Simcoe County District School Board
• Trillium Lakelands District School Board
• List of school districts in Ontario
• List of high schools in Ontario