| Matteo Ciacci | |
| Office: | Captain Regent of San Marino |
| Term Start: | 1 April 2018 |
| Term End: | 1 October 2018 |
| Alongside: | Stefano Palmieri |
| Predecessor: | Enrico Carattoni Matteo Fiorini |
| Successor: | Mirko Tomassoni Luca Santolini |
| Birth Date: | 1990 5, mf=yes |
| Birth Place: | Borgo Maggiore, San Marino |
| Party: | Civic 10 |
| Alma Mater: | University of Urbino |
Matteo Ciacci (born May 5, 1990)[1] [2] is a Sammarinese politician, who served as one of the Captains Regent, along with Stefano Palmieri. He took office on 1 April 2018 and served until 1 October 2018.[3]
He worked as an official and sports manager. Ciacci studied law at the University of Urbino. At the time of his appointment, he was the youngest serving state leader in the world, being the first to be born in the 1990s and after the fall of the Berlin Wall.