| Datem del Marañón | |
| Settlement Type: | Province |
| Subdivision Type: | Country |
| Subdivision Name: | Peru |
| Subdivision Type1: | Region |
| Subdivision Name1: | Loreto |
| Established Title: | Founded |
| Established Date: | August 2, 2005 |
| Seat Type: | Capital |
| Seat: | San Lorenzo |
| Leader Title: | Mayor |
| Area Total Km2: | 46609.9 |
| Elevation M: | 128 |
| Population Total: | 49446 |
| Population Density Km2: | auto |
| Blank Name Sec1: | UBIGEO |
| Blank Info Sec1: | 1607 |
The Datem del Marañón is one of the eight provinces in the Loreto Region of Peru. It was created on August 2, 2005 during the presidency of Alejandro Toledo.
The province is divided into six districts.