Arthur C. Eggleton PC (born September 29, 1943) is a retired Canadian politician who served as the 59th and longest-serving mayor of Toronto from 1980 to 1991. He was elected to Parliament in 1993, running as a Liberal in York Centre and served as a member of Parliament (MP) until 2004 when he declined to seek re-election. Eggleton held a number of cabinet positions from 1993 to 2002 including Treasury Board president, minister of infrastructure, minister of international trade, and minister of national defence. He was appointed to the Senate in 2005, serving until he reached the mandatory retirement age of 75 in 2018.