William Tierney Robarts (1786 - 9 December 1820 in London) was a British politician and businessman.
[1] He was the youngest son of Abraham Robarts and his wife Sabine (née Tierney).
[2] On 26 February 1818 he was elected to the House of Commons in the constituency of St. Albans, where he remained until his death.
[3] William Tierney Robarts died unmarried and childless on 9 December 1820.
[1] In the resulting by-election Henry Wright Wilson was elected to the House of Commons.