Fiera di Primiero was a comune located in the Trentino province of the northern Italian region of Trentino-Alto Adige/Südtirol. It was situated approximately 60 kilometres east of the city of Trento.
On January 1, 2016, Fiera di Primiero was merged with the municipalities of Siror, Tonadico, and Transacqua to form the new municipality of Primiero San Martino di Castrozza.