Tamás István Soproni (born 20 February 1986) is a Hungarian linguist, translator and politician, who has been the Mayor of Terézváros (6th district of Budapest) since 2019.

[3] Soproni was a joint candidate of the Together, Dialogue for Hungary, Hungarian Socialist Party and Democratic Coalition for a representative seat in Terézváros during the 2014 local elections.

His confrontational style during interviews at pro-government media portfolios raised his political awareness..[7] For instance, he interrupted the press conference of government spokesperson István Hollik, who described the Momentum's campaign as part of the work of "Soros network".

[8] News portal Index.hu reported existence of a continuous rivalry behind the scenes for leadership position between Soproni and president of the Momentum, András Fekete-Győr in January 2018.

[1] Soproni defeated incumbent mayor Zsófia Hassay (Fidesz) in the election, obtaining 57.49 percent of the vote.