Charles Rankin, PLS (1797 − 1886 or 12 October 1888) was an early Irish-born and Scottish-descended settler and land surveyor in Upper Canada (the predecessor to the province of Ontario, Canada). He is significant due to his role in the surveying and early settlement of large areas of Upper Canada, including much of the Bruce Peninsula and south shore of Lake Huron, and notably the city of Owen Sound. Born in 1797 at Enniskillen, County Fermanagh, Ireland, he died in either 1886 or 1888 in Owen Sound, a city whose founding he had been instrumental in.