Province of Pesaro and Urbino
Marche extends over an area of of the central Adriatic slope between Emilia-Romagna to the north, Tuscany and Umbria to the west, and Lazio and Abruzzo to the south, the entire eastern boundary being formed by the Adriatic. The Umbrian enclave of Monte Ruperto (a subdivision of the Comune of Città di Castello) is entirely surrounded by the Province of Pesaro and Urbino, which constitutes the northern part of the region.