Nimbus (1946–1972) was a British Thoroughbred racehorse. In a racing career which lasted from the spring of 1948 until August 1949, he ran nine times and won six races. Nimbus ran successfully as a two-year-old in 1948, winning the July Stakes, but reached his peak the following year. He won close finishes in both the 2000 Guineas and The Derby but was unable to attempt the Triple Crown after his career was ended by injury. He had modest success as a breeding stallion.