Cinergy
| Company type | Energy company | 
|---|---|
| Industry | Energy services | 
| Founded | 1994 (merger of Cincinnati Gas & Electric Company and PSI Energy) | 
| Defunct | 2006 | 
| Fate | Acquired by Duke Energy | 
| Successor | Duke Energy | 
| Headquarters | Cincinnati, Ohio | 
Cinergy Corp. (/ˈsɪnərdʒi/ SIN-ər-jee) was an energy company based in Cincinnati, Ohio, United States, from 1994 to 2006. Its name is a play on the words "synergy", "energy", and "Cincinnati".