Buttonville Municipal Airport

Buttonville Municipal Airport or Toronto/Buttonville Municipal Airport is a medium-sized airport in the neighbourhood of Buttonville in Markham, Ontario, Canada, 29 km north of Toronto. It is operated by Torontair. Due to its proximity to Toronto's suburbs, there are several strict noise-reduction procedures for aircraft using the airport, which is open and staffed 24 hours a day, 365 days a year. In 2014, Buttonville was Canada's 20th busiest airport by aircraft movements. There is also a weather station located at the airport.

The airport is classified as an airport of entry by Nav Canada and is serviced by the Canada Border Services Agency on a call-out basis from Oshawa Executive Airport during weekdays and Billy Bishop Toronto City Airport during weekends. CBSA officers at this airport handle general aviation aircraft only, with no more than 15 passengers.