| Fiera di Primiero | |
| Official Name: | Comune di Fiera di Primiero |
| Coordinates: | 46.1833°N 61°W |
| Region: | Trentino-Alto Adige/Südtirol |
| Province: | Trentino (TN) |
| Mayor: | Daniele Depaoli |
| Area Total Km2: | 0.15 |
| Population Total: | 521 |
| Population As Of: | 30 June 2009[1] |
| Population Demonym: | Fieracoli |
| Elevation M: | 722 |
| Saint: | Santa Maria Assunta |
| Day: | 15 August |
| Postal Code: | 38054 |
| Area Code: | 0439 |
Fiera di Primiero (La Fiera in local dialect) was a comune (municipality) in Trentino in the northern Italian region Trentino-Alto Adige/Südtirol, located about 60km (40miles) east of Trento. It was merged with Siror, Tonadico and Transacqua on January 1, 2016, to form a new municipality, Primiero San Martino di Castrozza.[2]
With an area of 0.15km2, Fiera di Primiero was one of the smallest municipalities in land area in Italy.