Iwata (written: 岩田 lit. "rock field") is a Japanese surname. Notable people with the surname include:
Karen Iwata, Japanese singer
Manzo Iwata, Japanese martial artist
Masaharu Iwata, Japanese video game composer
Masahiro Iwata, Japanese football player
Minoru Iwata, Japanese baseball pitcher
Mitsuo Iwata, Japanese voice actor
Satoru Iwata, former president and CEO of Nintendo
Sayuri Iwata, Japanese actress and J-Pop artist
Shinji Iwata, professional Japanese right-handed pitcher
Takuya Iwata, Japanese footballer
Yasunari Iwata, Japanese jockey
Yasuo Iwata, Japanese voice actor