John Clifford Leslie (June 15, 1920[1] – December 27, 2010) was a Canadian politician and businessman and the first native-born Calgarian elected as mayor of the city.
With the outbreak of war, he left his studies in Edmonton and joined the Royal Canadian Air Force.
He was instrumental in establishing the School Board Liaison Committee; led a successful fight to keep the Canadian Pacific Railway tracks off the banks of the Bow River; developed Nose Hill and Confederation parks; helped achieve "International" Airport status for Calgary; established the Airport Authority.
[citation needed] He also assisted in making Deerfoot Trail a safer road by implementing plans for proper intersections and cloverleafs.
Since returning to private life, Leslie has resumed his real estate appraisal business and lived in Calgary with his wife, the former Jean Logan, whom he married in 1942.