Robert Julien Mongrain (born August 31, 1959) is a Canadian former professional ice hockey centre.
He played in the National Hockey League with the Buffalo Sabres and Los Angeles Kings between 1979 and 1986.
The rest of his career, which lasted from 1979 to 1994, was spent in the minor leagues and then in the Swiss Nationalliga A.
He scored thirteen goals and added fourteen assists.
This biographical article relating to a Canadian ice hockey centre born in the 1950s is a stub.