Peterborough ( ) is a city on the Otonabee River in Central Ontario, Canada, 125 kilometres (78 mi) northeast of Toronto and about 270 kilometres (167 mi) southwest of Ottawa. According to the 2016 Census, the population of the City of Peterborough was 81,032. The population of the Peterborough Census Metropolitan Area (CMA), which includes the surrounding Townships of Selwyn, Cavan Monaghan, Otonabee-South Monaghan, and Douro-Dummer, was 121,721 in 2016. In 2016, Peterborough ranked No. 32 among the country's 35 census metropolitan areas according to the CMA in Canada. Significant growth is expected starting in late 2019 when the Ontario Highway 407 extension is completed, connecting it to Highway 115/35 south of Peterborough. The current mayor of Peterborough is Diane Therrien.