He was born in the Intake district of Sheffield, as the son of William and Jemima Ann Casey. He was educated at Gleadless Church School. He was married in 1894. He had two sons and three daughters. In 1916 his eldest son was killed in the First World War, Alphius. His memorial can be found in Thiepval in the Lancaster regiment.‘CASEY, Thomas Worrall’, Who Was Who, A & C Black, an imprint of Bloomsbury Publishing plc, 1920–2007; online edn, Oxford University Press, December 2007 accessed 1 January 2014
