Robert (Bob) Chiarelli (born September 24, 1941) is a retired Canadian politician, who from 2001 to 2006 was the mayor of Ottawa. In 2006, Chiarelli was elected to the Legislative Assembly of Ontario, serving as the Member of Provincial Parliament for the riding of Ottawa-West-Nepean. In the 2018 Ontario provincial election, Chiarelli was not reelected and decided he would retire from politics. Chiarelli grew up in Ottawa, and was married to the late Carol Chiarelli.