Briseis (1804–1824) was a British Thoroughbred racehorse and broodmare who won the classic Oaks Stakes at Epsom Downs Racecourse in 1807. Her win in the Oaks was her third win from as many starts, but she was beaten in her remaining three races before being retired from racing in 1808. At stud she proved to be a successful broodmare, producing several good winners including the dual classic winner Corinne. The mare's name was often spelled Briseïs.