Sir Joshua Jebb, KCB (8 May 1793 – 26 June 1863) was a Royal Engineer and the British Surveyor-General of convict prisons. He participated in the Battle of Plattsburgh on Lake Champlain during the War of 1812, and surveyed a route between Ottawa River and Kingston where Lake Ontario flows into Saint Lawrence River. However, his route was not followed by Colonel By in building the Rideau Canal.