The 1978 Portland Timbers season was the fourth season for the Portland Timbers in the now-defunct North American Soccer League.

The 1978 squad[1] Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Players may hold more than one non-FIFA nationality.

Pld = Matches played; W = Matches won; L = Matches lost; GF = Goals for; GA = Goals against; GD = Goal difference; Pts = PointsSource:[2] * = Shootout winSource:[3] * = Shootout win; MG = Series decided by 30-minute mini-game (score of mini-game in 3rd column)Source:[2] Source:[3]