Castelfiorentino is a city and comune (municipality) located in the Metropolitan City of Florence within the Tuscany region of central-northern Italy. It is situated in the Valdelsa area, positioned between the cities of Florence and Pisa (45 km away) and Siena (55 km away).
The municipality has a population of approximately 20,000 inhabitants. It shares borders with several neighboring municipalities, including Certaldo, Empoli, Gambassi Terme, Montaione, Montespertoli, and San Miniato.