Its capital is the city of Rimini, one of the "seven sisters" of the historical region of Romagna.
Since the transfer of nine comuni (municipalities) from Pesaro and Urbino in 2009 and 2021, the province of Rimini includes most of the historical region of Montefeltro.
[3] On 1 January 1996, the comuni of Gemmano, Montefiore Conca, Saludecio, Mondaino, Montegridolfo, Montescudo, Monte Colombo, San Clemente, and Morciano di Romagna formed the Valconca Union.
The comuni were Casteldelci, Maiolo, Novafeltria, Pennabilli, San Leo, Sant'Agata Feltria and Talamello.
[6] On 16 October 2016, a merger of the comune of Montegridolfo, Mondaino and Saludecio was rejected at referendum.