Matteo Ciacci
{{short description|Sammarinese politician|bot=PearBOT 5}}
{{Expand Italian|topic=bio|date=July 2018}}
{{Use dmy dates|date=September 2024}}
{{Infobox officeholder
| name = Matteo Ciacci
| image =
| 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 = {{birth date and age|df=yes|1990|5|5}}
| birth_place = Borgo Maggiore, San Marino
| death_date =
| death_place =
| party = Libera (since 2020)
Civic 10 (2012–2020)
| alma_mater = University of Urbino
| office2 = Leader of Libera
| termstart2 = 14 November 2020
}}
Matteo Ciacci (born 5 May 1990)[http://rulers.org/indexc3.html Rulers]{{cite web |url=https://www.consigliograndeegenerale.sm/on-line/home/organismi-istituzionali-e-commissioni-consiliari/consiglio-dei-xii/composizione/scheda17151272.html |title=COMPOSIZIONE |website=www.consigliograndeegenerale.sm}} {{in lang|it}} 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.[http://www.smtvsanmarino.sm/politica/2018/03/14/scheda-reggenti Stefano Palmieri e Matteo Ciacci: le schede dei nuovi Capitani Reggenti] {{in lang|it}}
He worked as an official and sports manager. Ciacci studied law at the University of Urbino.