| Honorific-Prefix: | Honourable |
| William Ngeleja | |
| Honorific-Suffix: | MP |
| Office: | Member of Parliament for Sengerema |
| Term Start: | December 2005 |
| Predecessor: | William Shija |
| Birth Date: | 5 October 1967 |
| Nationality: | Tanzanian |
| Party: | CCM |
| Alma Mater: | University of Dar es Salaam |
| Blank1: | Position(s) |
| Data1: | Co. Advocate, PwC TZ Co. Advocate, Vodacom TZ |
William Mganga Ngeleja (born 5 October 1967) is a Tanzanian CCM politician and Member of Parliament for Sengerema constituency since 2005.[1]