Uko Tachibana
- Born
- 15 March 1973 (53 years)
- Place of birth
- Tokyo, Japan
- Gender
- Female
Uko Tachibana (橘 U子, Tachibana Yūko, March 15, 1973) is a Japanese voice actress from Tokyo. Formerly affiliated with Gekidan 21 Seiki Fox, she is currently affiliated with Kenyu Office. Her old stage name is Mari Koshi (合志 真理, Kōshi Mari).
