 | Yuria Kozuki als Ponyo (voice) |
 | Hiroki Doi als Sosuke (voice) |
 | George Tokoro als Fujimoto (voice) |
 | Tomoko Yamaguchi als Risa (voice) |
 | Yuki Amami als Gran Mamare (voice) |
 | Kazushige Nagashima als Koichi (voice) |
 | Akiko Yano als Ponyo's Sister (voice) |
 | Shinichi Hatori als Anchorman (voice) |
 | Tokie Hidari als Kayo (voice) |
 | Rumi Hiiragi als Young Mother (voice) |
 | Tomoko Naraoka als Yoshie (voice) |
 | Kazuko Yoshiyuki als Toki (voice) |
 | Eimi Hiraoka als Kumiko (voice) |
| Nozomi Ōhashi als Karen (voice) |
 | Akiko Takeguchi als Noriko (voice) |
 | Eiko Kanazawa als (voice) |
 | Akihiko Ishizumi als (voice) |
 | Tomie Kataoka als (voice) |
 | Shirô Saitô als (voice) |
 | Mutsumi Sasaki als (voice) |
| Keiko Tsukamoto als (voice) |
 | Ikuko Yamamoto als (voice) |
| Michiko Yamamoto als (voice) |
| Yoshie Yamamoto als (voice) |
| Yusuke Tezuka als (voice) |
| Koji Hoshino | Executive Producer |
| Toshio Suzuki | Producer |
| Noboru Yoshida | Art Direction |
| Atsushi Okui | Director of Photography |
| Hayao Miyazaki | Director |
| Takeshi Seyama | Editor |
| Hayao Miyazaki | Writer |
| Joe Hisaishi | Original Music Composer |
| Kazuo Oga | Background Designer |
| Michiyo Yasuda | Color Designer |
| Yoji Takeshige | Background Designer |
| Katsuya Kondo | Animation Director |
| Atsuko Tanaka | Key Animation |
| Kenichi Yamada | Key Animation |
| Hideaki Yoshio | Key Animation |
| Eiji Yamamori | Key Animation |
| Kazuyoshi Onoda | Key Animation |
| Mariko Matsuo | Key Animation |
| Shougo Furuya | Key Animation |
| Makiko Suzuki | Key Animation |
| Seiji Okuda | Production Manager |
| Atsushi Tamura | Key Animation |
| Hiromasa Yonebayashi | Key Animation |
| Masafumi Yokota | Key Animation |
| Ryoichi Fukuyama | Production Manager |
| Masako Sato | Key Animation |
| Naoya Fujimaki | Production Manager |
| Shunsuke Hirota | Key Animation |
| Makiko Futaki | Key Animation |
| Shinji Otsuka | Key Animation |
| Hideki Hamasu | Key Animation |
| Kenichi Konishi | Key Animation |
| Sachiko Sugino | Key Animation |
| Hiroko Minowa | Key Animation |
| Nobuyuki Takeuchi | Key Animation |
| Hiroomi Yamakawa | Key Animation |
| Takashi Hashimoto | Key Animation |
| Takeshi Honda | Key Animation |
| Ryoko Ina | Background Designer |
| Fumie Konno | Key Animation |
| Sayaka Hirahara | Background Designer |
| Yoshikazu Fukutome | Background Designer |
| Masako Nagata | Background Designer |
| Youichi Watanabe | Background Designer |
| Kikuyo Yano | Background Designer |
| Yoichi Nishikawa | Background Designer |
| Osamu Masuyama | Background Designer |
| Junji Yabuta | Compositing Artist |
| Tsutomu Awata | Key Animation |
| Atsushi Tamura | Compositing Artist |
| Yuichiro Sueyoshi | Key Animation |
| Naoya Tanaka | Assistant Art Director |
| Naomi Kasugai | Assistant Art Director |
| Takashi Omori | Assistant Art Director |
| Mitsuo Yoshino | Background Designer |
| Yohei Takamatsu | Background Designer |
| Shiho Sato | Background Designer |
| Hidenori Shibahara | Compositing Artist |
| Norihiko Miyoshi | Compositing Artist |
| Miki Sato | Compositing Artist |
| Koji Kasamatsu | Sound Effects |
| Rie Matsubara | Assistant Editor |
| Keiko Kadokawa | Assistant Editor |
| Hiromi Sasaki | Assistant Editor |
| Mika Yamaguchi | Foley Artist |
| Shuji Inoue | Sound Mixer |
| Eriko Kimura | Sound Director |
| Eiko Matsushima | Painter |
| Hayao Miyazaki | Original Story |
| Yoshimi Shibata | Painter |
