Denis Murray Coolican (3 March 1913 – 20 October 1995) was a Canadian businessman and regional politician.
Just prior to his political career, he joined Brazilian Traction, Light and Power Company in a senior management capacity.
In 1968 he was appointed the first Chair of the Regional Municipality of Ottawa-Carleton and remained in that position until retiring in 1978.
The redeveloped property no longer bears Coolican's name, but today the location of the Académie de Formation Linguistique language training centre.
[1] The bilingual (English/French) Coolican was president of the Royal Canadian Geographical Society from 1977 to 1986, having been on that organisation's board since 1951.