Ontario College of Art & Design University (French: Université de l'École d'art et de design de l'Ontario), commonly known as OCAD University (/ˈoʊkæd/ OH-kad), is a public university of art and design located in Toronto, Ontario, Canada. The main campus is adjacent to the Art Gallery of Ontario, within the Grange Park neighbourhood. The school is Canada's largest and oldest educational institution for art and design. OCAD U offers courses through the Faculties of Art, Design, Liberal Arts and Sciences, and alternative programs. The enabling legislation is the Ontario College of Art and Design University Act, 2002 (previously the Ontario College of Art & Design Act).

The institution was established by the Ontario Society of Artists in 1876 as the Ontario School of Art, whose objective it was to provide professional artistic training, and further the development of art education in Ontario. The Ontario Society of Artists passed the motion to "draw up a scheme" for a school of art on 4 April 1876, and the first Ontario School of Art opened on 30 October 1876, funded by a government grant of $1,000. It opened on October 30, 1876 in a rented building at 14 King Street West. The enrollment was 25 students. The school moved to the Toronto Normal School building in 1883.