Cavendish is a Canadian unincorporated rural area in the township of Lot 23, Queens County, Prince Edward Island. Its primary industries are tourism and agriculture. Cavendish is the largest seasonal resort area on Prince Edward Island. Population in July and August swells to roughly 7,500. Located northwest of North Rustico and east of Stanley Bridge in the central part of the province on the north shore, fronting the Gulf of St. Lawrence.