Thallyson Augusto Tavares Dias (born 1 December 1991), simply known as Thallyson, is a Brazilian professional footballer who plays as a left back for ASA.
On 24 July 2020, Thallyson signed a two-year contract with Azerbaijan Premier League side Neftçi PFK. On 30 June 2021, Neftçi announced that Thallyson had left the club after his contract was ended by mutual agreement.