Quintessence (1900–1917) was a British Thoroughbred racehorse who won the 1000 Guineas of 1903 and was unbeaten in her six races. She was owned and bred by Evelyn Edward Thomas Boscawen, 7th Viscount Falmouth. After retiring from racing she became a successful broodmare, with her son Clarissimus winning the 2000 Guineas.