Leopold Macaulay (November 25, 1887 – December 24, 1979) was a Canadian politician and lawyer, born in Peterborough, Ontario.
He was first elected as Member of the Legislative Assembly (MLA) for the Toronto area riding of York South in 1926.
He was brought into the cabinet as Provincial Secretary and Registrar in September 1930 in the last few weeks of the administration of Ontario Premier George Howard Ferguson.
He was retained in that position when Ferguson's successor, George Henry formed his cabinet in December.
Macaulay kept his seat through the election and, in 1936, he was a candidate in the Ontario Conservative leadership convention placing fourth.