The 2025 World's Best Racehorse Rankings, sponsored by Longines was the 2025 edition of the World's Best Racehorse Rankings. It was an assessment of Thoroughbred racehorses issued by the International Federation of Horseracing Authorities (IFHA) on 20 January 2026. It included horses aged three or older which competed in flat races during 2025. It was open to all horses irrespective of where they raced or where they were trained.