North York forms the central part of the northern half of Toronto, Ontario, Canada. As of the 2006 Census, it has a population of 635,370. The official 2001 census count was 608,288. Until 1998, it was the second-largest of six municipalities that comprised another larger municipal structure called Metropolitan Toronto. The previous year, the provincial Government of Ontario passed legislation to merge these municipalities into a single, new amalgamated City of Toronto. North York is one of the most diverse areas of Toronto, as it contains some of the richest areas of the city (The Bridle Path, Hogg's Hollow, Willowdale, York Mills, Lawrence Park) and some of the poorest (Jane and Finch and Flemingdon Park).

The Township of North York was formed on June 13, 1922 out of the rural part of the Township of York. The rapidly-urbanizing parts of the Township remained in that township. As North York itself became more urbanized, it became the Borough of North York in 1967, and then on February 14, 1979, the City of North York. To commemorate receiving its city charter on St. Valentine's Day, the city's corporate slogan was "The City with Heart". It now forms the largest part of the area served by the "North York Community Council", a committee of Toronto City Council.

Originally, North York was known as a regional agricultural hub composed of scattered villages. The area boomed following World War II, and by the 1950s and 1960s, it resembled many other sprawling North American suburbs. Of note is the community of Don Mills. On August 10, 2008, a massive explosion occurred at the Sunrise Propane Industrial Gases propane facility just south of the old Downsview Airport. This destroyed the depot and damaged several homes nearby. About 13,000 residents were evacuated for several days before being allowed back home. One employee at the company was killed in the blast and one firefighter died while attending to the scene of the accident. A followup investigation to the incident made several recommendations concerning propane supply depots. It asked for a review of setback distances between depots and nearby residential areas but didn't call for restrictions on where they can be located. From Wikipedia, the free encyclopedia.