Hamanaka (written: 浜中) is a Japanese surname. Notable people with the surname include:
- Kazuhiro Hamanaka (浜中 和宏, born 1978), Japanese mixed martial artist
- Osamu Hamanaka (濱中 治, born 1978), former Japanese professional baseball player
- Sheila Hamanaka, American writer and illustrator
- Yasuo Hamanaka (浜中 泰男, born 1950), Japanese copper trader