Ira Delbert Cotnam (19 December 1883 – 25 February 1966) was a Canadian politician and physician.
Cotnam attended secondary school at Pembroke Collegiate Institute, then proceeded to Queen's University where he received his medical degrees (MD, CM).
His postgraduate work was conducted at hospitals in New York City, Chicago and London.
During the decade when Cotnam held Renfrew North, he was challenged by McKay in each election.
Cotnam made two further unsuccessful attempts to win the seat in 1949 and 1953, when he campaigned as a Progressive Conservative.