The 1977 Shellsport International Series was a Formula Libre motor racing championship held in the United Kingdom, the series ran F1, F2, F5000 and Formula Atlantic cars in the same race.
The second Shellsport International Series was contested over 14 rounds.
The Drivers' Championship was won by Englishman Tony Trimmer.
[1] The season was marred by the death of Brian McGuire during a practice session for round 11 at Brands Hatch.
Points are awarded to the top ten classified finishers using the following structure: