| Hiroshi Nagahama | |
| Native Name: | 長濱博史 |
| Native Name Lang: | ja |
| Birth Date: | 15 March 1970 |
| Birth Place: | Saiki, Ōita |
| Nationality: | Japanese |
| Years Active: | 1990–present |
is a Japanese animator and director. He is best known for directing Mushishi.
Hiroshi Nagahama started his career at Madhouse Studio as a mechanical designer for The Cockpit, and was also a part of the production staff for Azuki-chan and Yawara!. After leaving Madhouse Studio, he became a freelancer and worked on the conceptual design for the Revolutionary Girl Utena series. He has also worked as the storyboard writer and animation director for and Ojarumaru. Nagahama has been involved with the production of , Pokémon Heroes, Fruits Basket, Kimi ni Todoke, and X-Men. He directed the highly acclaimed Mushishi, Detroit Metal City, The Flowers of Evil and Hatsune Miku music videos "Downloader" and "Chime".