| Nanjirinji | |
| Official Name: | Kata ya Miteja, Wilaya ya Kilwa |
| Settlement Type: | Ward |
| Pushpin Map: | Tanzania |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | Lindi Region |
| Subdivision Type2: | District |
| Subdivision Name2: | Kilwa District |
| Seat Type: | Seat |
| Seat: | Najirinji Village |
| Area Total Km2: | 3,733 |
| Population As Of: | 2012 |
| Population Total: | 7,491 |
| Population Density Km2: | auto |
| Elevation M: | 224 |
| Postal Code Type: | Tanzanian Postal Code |
| Postal Code: | 65412 |
| Demographics Type1: | Ethnic groups |
| Demographics1 Title1: | Settler |
| Demographics1 Info1: | Swahili |
| Demographics1 Title2: | Native |
| Demographics1 Info2: | Mwera |
Nanjirinji is an administrative ward in Kilwa District of Lindi Region in Tanzania. The ward covers an area of,[1] and has an average elevation of .[2] According to the 2012 census, the ward has a total population of 7,491.[3] The ward seat is Nanjirinji village.[4] Nanjirinji ward is also the source of the Mavuji River.