The 1928–29 Detroit Cougars season was the third season of play for the Detroit National Hockey League franchise.
The Cougars placed third in the American Division to advance to the playoffs for the first time.
The Cougars lost in the first round to the Toronto Maple Leafs.
After the 1927–28 season, the Cougars traded the rights to Jack Arbour and $12,500 to the Toronto Maple Leafs for Jimmy "Sailor" Herbert.
[1] Note: GP = Games Played, W = Wins, L = Losses, T = Ties, Pts = Points, GF = Goals For, GA = Goals Against Teams that qualified for the playoffs are highlighted in bold.