Admiral Sir Roger Curtis, 1st Baronet, GCB (4 June 1746 – 14 November 1816) was an officer of the British Royal Navy, who saw action in several battles during an extensive career that was punctuated by a number of highly controversial incidents. Curtis served during the American Revolutionary War and the French Revolutionary Wars and was highly praised in the former conflict for his bravery under fire at the Great Siege of Gibraltar, where he saved several hundred Spanish lives at great risk to his own. His career suffered however in the aftermath of the Glorious First of June, when he was heavily criticised for his conduct by several influential figures, including Cuthbert Collingwood. His popularity fell further due to his involvement in two highly controversial courts-martial, those of Anthony Molloy in 1795 and James Gambier in 1810.