Irwin Barker (June 13, 1952 – June 21, 2010) was a Canadian comedian and writer. He wrote for This Hour Has 22 Minutes and The Rick Mercer Report, and was nominated for four Gemini Awards as a writer and one as stand-up performer for his 2005 performance at the Halifax comedy Festival. Barker was also nominated for three Writers' Guild of Canada Screenwriter's awards, and won the award in 2008. He was a regular writer and contributor for CBC Radio's The Debaters. He died in Toronto on June 21, 2010, at the age of 58, from his cancer.