Valentine Blake Dillon (1847 – 31 March 1904) was an Irish lawyer and politician. Valentine Blake Dillon was a nephew of John Blake Dillon and cousin of John Dillon. He qualified as a solicitor in 1870, and took part in many high-profile trials, including those related to the Land War. In 1891 he was the Parnellite candidate in the closely fought North Sligo by-election, but failed to win the seat. He later acted as election agent for James McCann in his successful campaign to win Dublin St Stephen's Green, a seat hitherto held by the Conservatives, and for his successor, Laurence Waldron.