Haruko Sagara (相楽 晴子, Sagara Haruko, born March 1, 1968 in Koriyama, Fukushima, Japan) is a Japanese actress and ex-idol singer in the 1980s.

She debuted in 1985 with her role as Okyo in the cult TV series Sukeban Deka II. She won the Award for Best Supporting Actress at the 11th Yokohama Film Festival for Dotsuitarunen. After some 10 movies, 20 TV series, 10 singles and 2 albums, she quit her career in 1995 to settle in Los Angeles, where she married an American, becoming Haruka Haynes. In 2008, she opened a travel agency in Hawaii.