The 1978 Pacific Coast League season was the 76th season in the league's history. It ended with the Albuquerque Dukes and Tacoma Yankees being declared co-champions.
Due to inclement weather, the fifth and deciding game in the semifinal series between Tacoma and the Portland Beavers was not played. After waiting three days and consulting the long-range weather forecast in Portland, league president Ray Jackson declared the co-championship. Tacoma earned the honor due to its better record.
The league expanded to 10 teams this year, adding Portland and the Vancouver Canadians. The playoff format expanded as well, as the top two teams in each division qualified.
Playoff teams in bold.
|Albuquerque vs. Salt Lake
||Salt Lake 3
||Salt Lake 7
||Salt Lake 5
|Albuquerque wins series 3-0
|Tacoma vs. Portland
|Series tied 2-2
- Batting Average Jeffrey Leonard, Albuquerque, .371
- Runs Scored Bill Sample, Tucson, 141
- Hits Leonard, 183
- Doubles Dan Briggs, Portland, 38
- Triples Art Gardner, Phoenix, 16
- Home Runs Willie Aikens, Salt Lake City, 29
- Runs Batted In Pedro Guerrero, Albuquerque, 116
- Stolen Bases Rudy Law, Albuquerque, 79
- Wins Eric Wilkins, Portland, 15
- Earned Run Average Larry McCall, Tacoma, 2.93
- Complete Games Steve Mura, Hawaii, 16
- Shutouts McCall, 4
- Strikeouts Mura, 158
- Saves Larry Andersen, Portland, 25