| Nasai Ward | |
| Official Name: | Kata ya Nasai, Wilaya ya Siha |
| Settlement Type: | Ward |
| Pushpin Map: | Tanzania |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | Kilimanjaro Region |
| Subdivision Type2: | District |
| Subdivision Name2: | Siha District |
| Area Total Km2: | 10.8 |
| Population As Of: | 2012 |
| Population Total: | 8,032 |
| Population Density Km2: | auto |
| Elevation M: | 1,377 |
Nasai is an administrative ward in Siha District of Kilimanjaro 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 8,032.[3]