Junín is a province in northwestern Junín Region, in the central highlands of Peru.

Some of the most important rivers are the Mantaro and the Ullkumayu (Ulcomayo).

The province borders the province of Tarma on the southeast, the province of Yauli on the southwest, and the Pasco Region provinces of Pasco on the north and northwest, and Oxapampa on the northeast.

The province of Junín is divided into four districts (Spanish: distritos, singular: distrito), each of which is headed by a mayor (alcalde): Flooding caused by heavy rains has often caused river to overflow, triggering floods.

This Junín Region geography article is a stub.