The 1975 NASCAR Winston West Series was the 22nd season of the series. The title was won by Ray Elder, his sixth in the series and second in a row.
The 1975 season included 18 individual races, although Ascot Park hosted three races and Manzanita Speedway, Riverside International Raceway, Portland Speedway, and Evergreen Speedway hosted two races each. The races at Riverside and the finale at Ontario Motor Speedway were in combination with the NASCAR Winston Cup Series.