| Primiero San Martino di Castrozza | |
| Official Name: | Comune di Primiero San Martino di Castrozza |
| Coordinates: | 46.1771°N 11.7965°W |
| Region: | Trentino-Alto Adige/Südtirol |
| Province: | Trentino (TN) |
| Frazioni: | Fiera di Primiero, Nolesca, Passo Rolle, Pieve, San Martino di Castrozza, Siror, Tonadico, Transacqua |
| Mayor: | Daniele Depaoli |
| Area Total Km2: | 200.74 |
| Population Footnotes: | [1] |
| Population Total: | 5401 |
| Population As Of: | 2017 |
| Elevation M: | 710 |
| Postal Code: | 38054 |
| Area Code: | 0439 |
Primiero San Martino di Castrozza is a comune (municipality) in the Province of Trentino in the Italian region Trentino-Alto Adige/Südtirol.
It was established on 1 January 2016 by the merger of the municipalities of Fiera di Primiero, Siror, Tonadico and Transacqua.[2]