Joseph William Ludwig (born 21 July 1959) is an Australian barrister and retired politician.
He was a member of the Australian Senate for the state of Queensland from July 1999 to May 2016, representing the Australian Labor Party.
Ludwig served in a range of portfolios in the first Rudd and the second Gillard ministries until his resignation from Cabinet as the Minister for Agriculture, Fisheries and Forestry and Minister Assisting the Attorney-General on Queensland Floods Recovery, in 2013.