The Sir Ernest MacMillan family home is a Toronto heritage property located at 115 Park Road, in the Rosedale neighbourhood of Toronto, Ontario, Canada. It was the family home of Sir Ernest and Lady Elsie MacMillan (née Keith), and was constructed during 1931 and 1932.
In 1931, Ernest and his wife Elsie, commissioned Page & Steele Architects, Toronto, for the construction of a new home at 115 Park Road.
The family home was later designated a Heritage Property, as adopted by Toronto City Council, on January 22, 1979. The house is also included in the South Rosedale Heritage Conservation District. South Rosedale was designated as a Heritage Conservation District under Part V of the Ontario Heritage Act, and also enacted by Toronto City Council, February 7, 2003.