Yūko Mori, born July 28, 1987, in Tokyo, Japan, is a voice actress known for her work in anime and related media. Her stage name is also written in Japanese as 森優子.

Mori's voice acting credits include a variety of supporting and recurring roles across numerous series. She is known for voicing Lannion in The Promised Neverland, a role she held for 23 episodes of the series. Other notable roles include Yuuta Asaba in You and Me. and its sequel You and Me. 2, as well as Kain in Sword Art Online. Her other work includes voicing Sumiko Yorifuji in Saki: Episode of Side A, Noriko in You and Me. 2, and Kuranosuke in Idol × Warrior Miracle Tunes!, a live-action series with an animated voice role.

Her more recent credits include roles in a variety of productions, such as a mother in Laid-Back Camp, a court lady in The Apothecary Diaries, a villa manager, a clerk, a TV reporter, a servant, and a nurse across multiple episodes of A Couple of Cuckoos, a female student in WAVE!! Surfing Yappe!! - Chapter 1, and a woman in Mitsuboshi Colors.