Yukiko Iwai (岩居 由希子, Iwai Yukiko, born January 13, 1972) is a Japanese voice actress who is best known for her voice role as Ayumi Yoshida in Detective Conan. She was born in Chiba.

• Ping Pong Club - Junko Hoshino
• Saint Tail - female student (ep 5); first year girl A (ep 11)

• Detective Conan - Ayumi Yoshida
• Brave Command Dagwon - Woman

• Kindaichi Shounen no Jikenbo - Chie Hirashima/Keiko Horiguchi/Yuu Tokihara
• Manmaru the Ninja Penguin - Harigawa

• The SoulTaker - Kasumi Shiina

• GetBackers - Kakei Sakura

• Mujin Wakusei Survive - Luna

• Ragnarok the Animation - Hana Tsukiyo
• Tsuki wa Higashi ni Hi wa Nishi ni: Operation Sanctuary - Kyouko Nishina
• Girls Bravo - Nanae-Kuh-Haruka

• Kotenkotenko - Bagworm

• Going Wild - Monta
• Gift - eternal rainbow - Nami Rio
• Kenichi: The Mightiest Disciple - Makoto Himeno

• Double Duty Nurses - Shinohara Kaname

• Hakken Taiken Daisuki! Shimajirō - Rit-chan
• Clannad After Story - Teacher (ep 23)

• Doraemon - Girl

• Yukiko Iwai at Anime News Network's encyclopedia