Adam John Marshall (born 4 September 1984[citation needed]) is an Australian politician who represented Northern Tablelands in the New South Wales Legislative Assembly from 2013 to 2024, as a member of The Nationals.

In his final year, he was voted by his peers as the "person most likely to be Australian Prime Minister", which is a prediction he is also said to have made as a youth, to fellow students on the school bus.

Marshall moved to Armidale in 2012, resigning from the council, and commenced studying commerce at the University of New England, prior to his endorsement as a candidate for the March 2013 by-election held after sitting independent member Richard Torbay was forced out of politics amid allegations of corruption.

During his preselection bid ahead of the Northern Tablelands by-election in 2013, it was revealed that Marshall once held concurrent membership with both the Nationals and Labor from 2001 to 2003, while also being employed on the staff of independent Member for Tamworth, Peter Draper.

Country Labor organiser Courtney Roche said Marshall would have been deemed to be a card carrying member of the party until 2004, after which his membership expired.

[4] Following the 2019 state election Marshall was appointed the Minister for Agriculture and Western New South Wales in the second Berejiklian ministry with effect from 2 April 2019.