Larissa Joy Waters (born 8 February 1977) is an Australian politician and member of the Australian Greens.
She currently sits in the Australian Senate, representing the state of Queensland.
Waters initially served in the Senate from 2011 until July 2017, and in that time was deputy leader of the Greens, though she resigned due to holding dual citizenship of Australia and Canada, in violation of Section 44 of the Constitution of Australia.
She was re-appointed to the Senate in September 2018.