Carleton Lamont MacMillan, CM (April 18, 1903 – February 10, 1978) was a physician and political figure in Baddeck, Nova Scotia, Canada.
He represented Victoria in the Nova Scotia House of Assembly from 1949 to 1967 as a Liberal member.
He was educated at Sydney Academy, Acadia University and Dalhousie Medical School.
In 1972, he was named to the Order of Canada for a lifetime of service as a general practitioner and as a medical health officer in Nova Scotia.
This article about a Liberal party Member of the Nova Scotia House of Assembly is a stub.