Mary Kate

Mary Kate may refer to:


 * Mary-Kate Fisher, American former political appointee
 * Mary-Kate Geraghty, birth name of MayKay (born 1986), Irish musician
 * MaryKate Glidewell, birth name of Sage Beckett (born 1985), American retired professional wrestler
 * Mary Kate McGeehan, American actress and screenwriter
 * Mary Kate McGowan, American professor of philosophy, and legal scholar
 * Mary-Kate Olsen (born 1986), American businesswoman, fashion designer, equestrian, and former actress
 * Mary Kate Schellhardt (born 1978), American actress
 * Mary Kate Wiles (born 1987), American film and web series actress