Robert Stewart Aucher Warner (9 May 1859 – 1 December 1944) was Attorney-General of Trinidad and Tobago and a West Indian cricketer.
He was appointed an unofficial member of the Legislative Council of Trinidad and Tobago, an advisory body at the time, in March 1900.
Apparently it was at his suggestion that the Inter-Colonial Tournament was instigated, however he himself only ever played two matches in the competition.
He made his debut in important matches playing for Trinidad against Slade Lucas's side in 1894-95 scoring 77 in his first innings.
He was captain of the first West Indian touring side to England in 1900 but contracted malarial fever and made only 7 appearances for the tourists.