Mahdzir bin Khalid (Jawi: ???? ?? ????; born 15 December 1960) is a Malaysian politician.
He is a member of the United Malays National Organisation (UMNO) party in Malaysia's opposition Barisan Nasional (BN) coalition.
He is also the Member of Parliament of Malaysia for the seat of Padang Terap, Kedah, having been elected in the 2013 general elections.
Mahdzir had served as Minister of Education of Malaysia from 2015 until 2018 when BN lost control of the federal government.
He was formerly Deputy Minister of Energy, Green Technology and Water from 2013 to 2015.
Previously, he served as the ninth Menteri Besar of Kedah from 2005 to 2008 and represented the seat of Pedu in the Kedah State Legislative Assembly from 2004 to 2013.