The 2020 World's Best Racehorse Rankings, sponsored by Longines was the 2020 edition of the World's Best Racehorse Rankings.[1] It was an assessment of Thoroughbred racehorses issued by the International Federation of Horseracing Authorities (IFHA) on 26 January 2021.[2] It included horses aged three or older which competed in flat races during 2020, and was open to all horses irrespective of where they raced or where they were trained.