After ending his playing career, Kilrea started coaching minor hockey in Ottawa. He first made a name for himself when his Ottawa West Midget AA team defeated a touring Soviet squad, the only loss by the Soviets on their tour. This caught the attention of the owners of the OHL major junior
Ottawa 67's and they soon offered him a coaching job, replacing Leo Boivin at the start of the 1974–75 season. He would continue coaching the 67's until 1984, when he became an assistant coach with the defending
Stanley Cup champions,
New York Islanders of the NHL. However, after two seasons, he would return to coaching the 67's. Head coach of the Sarnia Sting, Dave McQueen played for Kilrea and said that Kilrea had his players over to his house at Christmas but when you were in his 'dog house' it was often tough to get out. On March 15, 2009, Ottawa beat the
Kingston Frontenacs 5–3 to give Kilrea a win in his final regular season game, giving him 1,193 wins all-time. Kilera returned behind the bench on October 17, 2014, for the Ottawa 67's to celebrate his 80th birthday. He became the oldest coach in hockey history, winning career game number 1,194 by a score of 6–3 against the
Mississauga Steelheads. Kilrea served as a recurring assistant coach to
Don Cherry in the
CHL/NHL Top Prospects Game. ==Personal life==