| Castel Focognano | |
| Official Name: | Comune di Castel Focognano |
| Coordinates: | 43.6539°N 11.8372°W |
| Province: | (AR) |
| Frazioni: | Rassina (capital), Calleta, Carda, Castel Focognano, Ornina, Pieve a Socana, Salutio, Zenna |
| Mayor: | Massimiliano Sestin |
| Area Total Km2: | 56.63 |
| Population Total: | 3102 |
| Population As Of: | 31 May 2017 |
| Population Demonym: | Focognanesi or Rassinesi |
| Elevation M: | 310 |
| Saint: | St. Martin of Tours |
| Day: | 11 November |
| Postal Code: | 52016 |
| Area Code: | 0575 |
Castel Focognano is comune in the province of Arezzo, Tuscany, central Italy. The comune lies in the Casentino valley on the left bank of the River Arno. Although it is named after a village on the slopes of the Alpe di Catenaia, the municipal seat is in the industrial town of Rassina.
During World War II Rassina was home for many American soldiers who were hiding or preparing the offensive on the German army.
Many people were killed while fighting with Fascist soldiers.
In 1992 Rassina was completely flooded by the Arno river.
Today Rassina is expanding and is becoming one of Casentino's leading industrial centres. It is home to one of Europe's largest cement works.
Champcevinel, France, since 1992