| Province of Rieti | |
| Native Name Lang: | it |
| Settlement Type: | Province |
| Subdivision Type: | Country |
| Subdivision Name: |  Italy |
| Subdivision Type1: | Region |
| Subdivision Name1: | Lazio |
| Seat Type: | Capital(s) |
| Seat: | Rieti |
| Parts Type: | Comuni |
| Parts Style: | para |
| P1: | 73 |
| Leader Party: | Lega |
| Leader Title: | President |
| Leader Name: | Roberta Cuneo |
| Unit Pref: | Metric |
| Area Total Km2: | 2749.16 |
| Population Total: | 157887 |
| Population As Of: | 30 June 2016 |
| Population Density Km2: | auto |
| Demographics Type2: | GDP |
| Demographics2 Footnotes: | [1] |
| Demographics2 Title1: | Total |
| Demographics2 Info1: | €2.943 billion (2015) |
| Demographics2 Title2: | Per capita |
| Demographics2 Info2: | €18,542 (2015) |
| Timezone1: | CET |
| Utc Offset1: | +1 |
| Timezone1 Dst: | CEST |
| Utc Offset1 Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 02010-02016, 02018-02026, 02030-02035, 02037-02044, 02046-02048, 02949 |
| Area Code Type: | Telephone prefix |
| Area Code: | 0744, 0746, 0765 |
| Registration Plate: | RI |
| Blank Name Sec1: | ISTAT |
| Blank Info Sec1: | 57 |
The province of Rieti (Italian: provincia di Rieti) is a province in the Lazio region of Italy. Its capital is the city of Rieti. Established in 1927, it has an area of 2750.52km2 with a total population of 157,887 people as of 2017.[2] There are 73 comuni (: comune) in the province.
A large part of its territory corresponds to the historical-geographical region of Sabina. Rieti is located in the north-east Lazio. It is bordered to the west, along the river Tiber by the province of Viterbo and to the south-west by the Metropolitan City of Rome Capital. It is also bordered by the regions of Umbria to the north and by Marche to the east.
The province is largely mountainous with the Monti della Duchessa and the Monti del Cicolano ranges in the south with Monte Nuria and Monte Giano, the Monti Reatini range with Monte Terminillo (2217 m) in the north in part of the Abruzzese Apennines,[3] and Monti della Laga (2458 m) to the east on the border with Abruzzo. Of particular importance are the two artificial lakes in the Valle del Salto: Lago del Salto and Lago del Turano, both created during the Fascist period. Lago del Salto is the largest in the Lazio region and is situated at an altitude of .[4]
There are several protected areas in the province. To the south lies the Parco regionale naturale dei Monti Lucretili,[5] to the southeast the Riserva regionale Montagne della Duchessa, and a small part of the Parco regionale naturale del Sirente - Velino. Between the two areas is the Riserva naturale Monte Navegna e Monte Cervia (between the lakes of Salto and Turano. In the east, in the Monti della Laga range is the Parco Nazionale del Gran Sasso e Monti della Laga. Also of note is the Riserva parziale naturale dei Laghi Lungo e Ripasottile on the Rieti Plain, and the Riserva naturale di Nazzano, Tevere-Farfa to the west. Riserva parziale naturale dei Laghi Lungo e Ripasottile contains the lakes of Lungo and Ripasottile, which support a diversity of wildlife, particularly birds such as herons and little grebes.[4] There are numerous natural oases, castles, fortresses and Franciscan sanctuaries dotted about the province of Rieti.[4]