Iwanaga (written: 岩永) is a Japanese surname. Notable people with the surname include:
- Hiroaki Iwanaga (岩永 洋昭, born 1979), Japanese model and actor
- Hiromi Iwanaga (岩永 浩美, born 1942), Japanese politician
- Mineichi Iwanaga (岩永 峯一, born 1941), Japanese politician
- Rin Iwanaga (岩永 鈴, born 1999), Japanese badminton athlete
- Tetsuya Iwanaga (岩永 哲哉, born 1970), Japanese voice actor
This page lists people with the surname Iwanaga.
If an internal link intending to refer to a specific person led you to this page, you may wish to change that link by adding the person's given name(s) to the link.
If an internal link intending to refer to a specific person led you to this page, you may wish to change that link by adding the person's given name(s) to the link.