Douglas Ivan Cosman (born May 21, 1938) is a minister, businessman, and former political figure in New Brunswick, Canada.
He represented Kings East in the Legislative Assembly of New Brunswick from 1999 to 2003 as a Progressive Conservative member.
He studied at Mount Allison University and Pine Hill Divinity Hall in Halifax.
Cosman was ordained a minister in the United Church and served in Albert County from 1962 to 1965.
This article about a member of the Legislative Assembly of New Brunswick is a stub.