| Alto Nanay District | |
| Native Name: | Distrito de Alto Nanay |
| Native Name Lang: | es |
| Settlement Type: | District |
| Mapsize: | frameless |
| Subdivision Type: | Country |
| Subdivision Name: |  Peru |
| Subdivision Type1: | Region |
| Subdivision Name1: | Loreto |
| Subdivision Type2: | Province |
| Subdivision Name2: | Maynas |
| Parts Type: | Subdivisions |
| Parts Style: | para |
| Established Title: | Founded |
| Established Date: | July 2, 1943 |
| Seat Type: | Capital |
| Seat: | Santa María de Nanay |
| Leader Title: | Mayor |
| Leader Name: | Juan José Gaviria Piña |
| Unit Pref: | Metric |
| Area Total Km2: | 14290.8 |
| Elevation M: | 128 |
| Population Total: | 2826 |
| Population As Of: | 2005 census |
| Population Density Km2: | auto |
| Timezone1: | PET |
| Utc Offset1: | -5 |
| Blank Name Sec1: | UBIGEO |
| Blank Info Sec1: | 160102 |
Alto Nanay District is one of thirteen districts of Maynas Province in Peru.[1]