| Official Name: | Fiorentino |
| Flag Size: | 150px |
| Mapsize: | 150px |
| Pushpin Map: | San Marino |
| Subdivision Type: | Country |
| Subdivision Name: |  San Marino |
| Leader Title: | Capitano |
| Leader Name: | Claudio Mancini (since 2020) |
| Area Total Km2: | 6.57 |
| Population As Of: | May 2018 |
| Settlement Type: | Castello |
| Population Total: | 2,548[1] |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Coordinates: | 43.9106°N 12.4556°W |
| Elevation M: | 490 |
| Postal Code Type: | Postal code |
| Postal Code: | 47897 |
| Blank Name: | Climate |
| Blank Info: | Cfb |
| Parts Type: | Curazie |
| P1: | Capanne, Crociale, Pianacci |
Fiorentino is one of the nine castelli of San Marino. It has 2,548 inhabitants (May 2018)[1] in an area of 6.57km2.
It borders the San Marino municipalities Chiesanuova, San Marino, Borgo Maggiore, Faetano, and Montegiardino and the Italian municipalities Monte Grimano and Sassofeltrio.
Fiorentino contains three : Capanne, Crociale, and Pianacci.[2] [3]
Evidence indicates a settlement existed on the site before Roman times.
The Tre Fiori FC, most successful club in the San Marino league is playing in Fiorentino.