Yuko Kobayashi (小林 優子; born on February 6, 1961 in Tokyo) is a Japanese voice actress, affiliated with 81 Produce.
Yuko Kobayashi is married to voice actor Mitsuaki Hoshino. She started her career in 1982. She was the voice actress for the filler character Maron in Dragon Ball Z. She is also known for her portrayal of Gary Oak in the Pokémon anime, and Nico Robin in One Piece as a temporary replacement for Yuriko Yamaguchi.