Ismet Sezgin (6 January 1928 – 7 December 2016) was a Turkish politician who served as the Deputy Prime Minister of Turkey and Minister of National Defence from 1997 to 1999, as the Speaker of the Grand National Assembly in 1995, as the Minister of the Interior from 1991 to 1993, as the Minister of Finance from 1979 to 1980 and as the Minister of Youth and Sports from 1969 to 1971.
Between 1999 and 2002, he served as the Leader of the Democrat Turkey Party, but did not contest any elections.
With a history in the Turkish political right, Sezgin had actively participated in the historical Democrat Party led by Adnan Menderes until the 1960 coup d'état.
Entering Parliament as a Member of Parliament for Aydin in the 1961 general election, he served continuously as an MP until the 1980 coup d'état, after which he was re-elected in the 1991 general election.
He lost his seat in the 1999 general election and retired from active politics in 2002.
He was also active in sport, having served as the 15th Chairman of Gençlerbirligi S.K.