Meghan McCarthy is an American screenwriter, lyricist, and producer for several animated television shows, in particular My Little Pony: Friendship Is Magic and Season 4 of Littlest Pet Shop. Her writing credits also include Foster's Home for Imaginary Friends, Class of 3000, and Fish Hooks.

In October of 2010, she was invited by Lauren Faust, the co-creator and producer for Foster's, to help write on Hasbro's television revival of its My Little Pony franchise. McCarthy, on a writing hiatus at the time, took the opportunity knowing Faust's dedication and the strong female characterization she had presented. In 2011, Faust left the show after the two-part season two premiere, and McCarthy was promoted to co-executive producer for its third season onward; she also served as the show's story editor. In early June 2015, Hasbro promoted McCarthy to become the company's new "Head of Storytelling" for their brands, My Little Pony and Littlest Pet Shop; her role will be to help "create expansive worlds and characters" across these brands, according to Hasbro's executive vice president Stephan Davis.

In addition, McCarthy has written and helped produce the spin-off films, My Little Pony: Equestria Girls and its sequel. She has been nominated for a Daytime Emmy for "Outstanding Original Song - Children's and Animation" for her lyrics in the Friendship Is Magic episode "Sweet and Elite".