Kimberly Hart (Kimberly Ann Hart) was a character (better known as the Pink Ranger) on the television series Mighty Morphin Power Rangers, played by the actress Amy Jo Johnson. Kimberly was one of the original 5 Power Rangers present when Rita was released from her dumpster and started attacking Earth.

Mid-way through Season 3 (1995), Kimberly was written off the show (supposedly by request of the actress herself) and replaced by Katherine Hillard, played by Catherine Sutherland. Kimberly left to train under world-famous gymnastics coach Gunthar Schmidt for the Pan Global Games in what seems to be Orlando, Florida.

Thomas Oliver, played by Power Rangers veteran Jason David Frank, was Kimberly's boyfriend and the two shared many dates and tender moments.

Kimberly returned briefly during Turbo: A Power Rangers Movie, when she and Jason were captured by Divatox while scuba diving to serve as offerings to Maligore, Divatox's fiance.

In Mighty Morphin Power Rangers: The Movie, the Pink Ranger suit was modified with metal plating and a new helmet design, as well as no skirt (possibly on the request of the fans).

Kimberly's cousin is Kelly Hart, who in Season One's "Enter... the Lizzinator" tried out for the Angel Grove Junior High cheerleading team, following in Kimberly's footsteps.