Thalles may refer to:
Thallyson (footballer, born 1991), full name Thallyson Augusto Tavares Dias, Brazilian football left-back Thallyson (footballer, born 1996), full name Thallyson Gabriel Lobo Seabra, Brazilian football midfielder
See also Thalisson (born 1998), full name Thalisson Kelven da Silva, Brazilian football centre-back