Charles Leonard Irby (9 October 1789 – 3 December 1845) was an officer of the Royal Navy who saw service during the Napoleonic Wars and the War of 1812. He undertook a tour of Europe and the Middle East between 1816 and 1818.
Born on 9 October 1789, he was sixth son of Frederick Irby, 2nd Baron Boston, and brother of Frederick Paul Irby. He entered the navy in May 1801, and after serving in the North Sea and Mediterranean, at the Cape of Good Hope, the capture of Montevideo in 1807, and in the Bay of Biscay, was promoted lieutenant on 13 October 1808. He then served at the invasion of Isle de France, and on the coast of North America. On 7 June 1814 was promoted to the command of HMS Thames, in which he took part in the battle of New Orleans.
In August 1826 Irby was appointed to command the sloop HMS Pelican in the eastern Mediterranean, where she was employed in the suppression of piracy. On 2 July 1827 he was posted to HMS Ariadne, but was not relieved from the command of the Pelican till the end of September. After the battle of Navarino he was appointed by Sir Edward Codrington to bring home HMS Genoa, whose captain Walter Bathurst had been killed, which he paid off at Plymouth in January 1828.
Irby saw no further naval service, and died at Torquay on 3 December 1845.