Martin Browne (born 1965/1966) is an Irish former Sinn Féin politician who served as a Teachta Dála (TD) for the Tipperary constituency from 2020 to 2024.

[4] A native of Cashel, he was elected as a member of Tipperary County Council in 2014 for the Cashel—Tipperary local electoral area, serving for 5 years before losing his seat.

Browne has previously used his social media to share a conspiracy theory that the September 11 attacks had been staged using holograms, as well as sharing a post in which Fidel Castro compared NATO to the Nazi SS and accused the USA and Israel of "creating" ISIS and another post in which he questioned reports that Syrian president Bashar al-Assad had used chemical weapons on his own people.

[6][7] In July 2021 Browne faced criticism after he refused to condemn the 1996 killing of Garda Detective Jerry McCabe by members of the Provisional IRA, despite the fact that Sinn Féin leader Mary Lou McDonald unequivocally condemned it days previously.

[11] His brother Michael was Mayor of Cashel, and met with Elizabeth II on her visit to Ireland in 2011.