Nicholas Dumoulin (born July 21, 1985, in Prevost, Quebec) is a Canadian defenceman playing for the Saguenay Marquis of the Ligue Nord-Américaine de Hockey. He played junior hockey for the Saint-Jérôme Panthers and college hockey for the Elmira Soaring Eagles of the NCAA. Dumoulin turned pro in 2008-09 with the Rio Grande Valley Killer Bees and then played two seasons in Germany and Austria. He returned to Canada in 2011 to join the Marquis.