John Clark Donatelli (born November 22, 1965) is an American former professional ice hockey player and is the current head coach of the Tipos Extraliga's HC Nové Zámky.

Internationally Donatelli played for the American national team at several World Championships, the 1988 and 1992 Winter Olympics.

During the 2015–16 season, the Nailers' American Hockey League affiliate Wilkes-Barre/Scranton Penguins promoted him as the interim head coach as their head coach, Mike Sullivan, had been promoted to Pittsburgh Penguins.

He became the permanent head coach of the WBS Penguins after the season ended.

Donatelli had a record of 154–94–20–9 with Wilkes-Barre/Scranton, leading the Penguins to three Calder Cup Playoff appearances and a regular season title in 2016–17.