| Honorific-Prefix: | Honourable |
| Mary Nagu | |
| Honorific-Suffix: | MP |
| Term End: | 5 November 2015 |
| Order2: | 13th |
| Office2: | Member of parliament |
| Term Start2: | 13 February 2008 |
| Term End2: | 28 November 2010 |
| Term Start4: | December 2015 |
| Birth Date: | 11 May 1952 |
| Birth Place: | Tanganyika |
| Nationality: | Tanzanian |
| Party: | CCM |
| Alma Mater: | University of Dar es Salaam |
Mary Michael Nagu (born 11 May 1952) is a Tanzanian CCM politician and Member of Parliament for Hanang constituency since 2005. She is the former Minister of State in the Prime Minister's Office for Investment and Empowerment.[1]
Nagu served as Minister of Justice and Constitution Affairs from 2006 to 2008.[2]