David Walter Chomiak (born February 15, 1953) is a former politician in Manitoba, Canada. He served as a cabinet minister in the New Democratic Party government of Greg Selinger.
Chomiak was re-elected in the 1995 election, defeating Tory Robert Praznik 5812 votes to 3624. He again increased his margin of victory in the 1999 election, defeating PC candidate Shannon Martin by 6101 votes to 2542. The NDP won this election, and Chomiak was appointed to cabinet as Minister of Health and Minister responsible for Sport. He was relieved of responsibility for Sport on January 17, 2001.
In 2003, he was re-elected in the once-marginal riding of Kildonan with over 70% of the vote. On October 12, 2004, he was appointed as Manitoba's Minister of Energy, Science and Technology, with responsibility for the Gaming Control Act and the Manitoba Hydro Act. Chomiak had been the longest-serving health minister in Canada prior to this shuffle, and there were rumours that he requested a transfer to a less stressful portfolio.