1975 SCCA/USAC Formula 5000 Championship season

The 1975 SCCA/USAC Formula 5000 Championship season was the ninth season of the Sports Car Club of America's premier open wheel racing series. In light of the Can Am Series' folding the previous year, Formula 5000 became the SCCA's flagship series. However, only two years later, Formula 5000 would form the basis for a revived Can Am Series. Three rounds of the 1975 series were championship races co-sanctioned by the United States Auto Club. After 1975, Lola's dominance would end as March and Shadow would win events the following year. It would also be the end of Chevrolet's several year sweep of F5000, as Dodge would garner a victory the following year.

The 1975 SCCA/USAC Formula 5000 Championship was won by Brian Redman driving a Lola T332 Chevrolet.