| Giannis Maniatis | |
| Birth Date: | 11 October 1956 |
| Office: | Member of the European Parliament for Greece |
| Term Start: | 16 July 2024 |
| Office1: | Member of the Hellenic Parliament |
| Term Start1: | 7 March 2004 |
| Term End1: | 31 December 2014 |
| Term Start2: | 20 September 2015 |
| Term End2: | 11 June 2019 |
| Office3: | Minister of the Environment and Energy of Greece |
| Term Start3: | 25 June 2013 |
| Term End3: | 27 January 2015 |
| Preceded3: | Evangelos Livieratos |
| Succeeded3: | Panagiotis Lafazanis |
| Party: | PASOK |
| Alma Mater: | National Technical University of Athens |
Giannis Maniatis (born 11 October 1956)[1] is a Greek politician. He worked as an engineer and attended at the National Technical University of Athens. He served as a member of the Hellenic Parliament for PASOK from 2004 to 2019, and as Minister of the Environment and Energy of Greece.