Mark Christopher Butler (born 8 July 1970) is an Australian politician. He is a member of the Australian Labor Party (ALP) and has served in the House of Representatives since 2007. He was a minister in the Gillard and Rudd Governments and also served as national president of the ALP from 2015 to 2018. After the ALP's defeat at the 2013 election, Butler was a member of shadow cabinet under opposition leaders Bill Shorten and Anthony Albanese. He is a senior member of the Labor Left faction and was elected to a three-year term as national president in 2015.