Morneau's parents are William Francis "Frank" Morneau, Sr. who came from Walkerville, Windsor, Ontario and Helen (Lynch) Morneau who came from Adjala Township, Alliston, Ontario and their families had deep roots in both areas.
Morneau lives in Toronto and has three children, Henry, Clare, and Edward with his wife Nancy McCain, a member of the New Brunswick family that owns McCain Foods [REF].