| Trecastelli | |
| Official Name: | Comune di Trecastelli |
| Coordinates: | 43.6719°N 13.1063°W |
| Province: | (AN) |
| Frazioni: | Brugnetto, Castel Colonna, Croce, Francavilla, Giombino, Monterado, Passo Ripe, Ponte Lucerta, Ponterio, Ripe |
| Mayor: | Faustino Conigli |
| Area Total Km2: | 38.66 |
| Population Footnotes: | [1] |
| Population Total: | 7570 |
| Population As Of: | 30 November 2017 |
| Elevation Footnotes: | [2] |
| Elevation M: | 143 |
| Saint: | John Paul II |
| Day: | 22 October |
| Postal Code: | 60012 |
| Area Code: | 071 |
Trecastelli is an Italian comune in the province of Ancona, in Marche, created in 2014[3] from the merger of the comuni of Ripe, Castel Colonna and Monterado. These three towns are now frazioni of the administration. The municipal seat is in Ripe. The municipality borders with Corinaldo, Mondolfo, Monte Porzio, Ostra, San Costanzo and Senigallia.