Mieko Harada (原田 美枝子, Harada Mieko, born on December 26, 1958) is a Japanese actress from Tokyo. She has played various roles in many motion pictures, television shows and television dramas since her debut in 1974.

She most notably portrayed Lady Kaede in Akira Kurosawa's 1985 film Ran, and further collaborated with him in his 1990 film Dreams. Harada also most notably provided the voice for Kaguya in the 2002 anime film InuYasha the Movie: The Castle Beyond the Looking Glass. She is currently working on television dramas as of 2007.

She won the award for best actress at the 21st Hochi Film Award for Village of Dreams and at the 23rd Hochi Film Award for Begging for Love.

Harada is married to Ryo Ishibashi since 1987 and has three children.