The Province of Rieti (Italian: Provincia di Rieti) is a province in the Lazio region of Italy. Its capital is the city of Rieti.

It has an area of 2,749 km², and a total population of 153,258 (2005). There are 73 comuni (singular: comune) in the province[1], see Comuni of the Province of Rieti.

It was founded in 1927.