The Transport Ticketing Authority (TTA) was a statutory authority within the Department of Transport in the State Government of Victoria, Australia. It was established in June 2003 to manage Victoria's interest in the OneLink Metcard public transport ticketing system contract, and to procure and manage the new ticketing system for Victoria, eventually known as myki.
On 10 February 2010, the Minister for Public Transport replaced Gary Thwaites, chief executive of the Transport Ticketing Authority (TTA), with Bernie Carolan, the then head of Metlink.
On 1 January 2013, as the third stage of the implementation of the Public Transport Development Authority Act 2011, Public Transport Victoria assumed the responsibilities of the TTA, which was formally abolished on 1 July 2013.