Peter Murray Nicholson (March 31, 1919 – August 17, 1986) was a political figure in Nova Scotia, Canada. He represented Annapolis West in the Nova Scotia House of Assembly from 1956 to 1978 as a Liberal member. A graduduate of Dalhousie University, Nicholson served in the Executive Council of Nova Scotia as Minister of Finance, and Deputy Premier. He was appointed to the Supreme Court of Nova Scotia in 1981. His son Peter John Nicholson is also a member of the Nova Scotia Liberal Party and represented the electoral district of Victoria in the Nova Scotia House of Assembly from 1978 to 1980.