Hetty Margarete Johnston, AM (born 27 September 1958), is the Founder and Executive Director of Bravehearts Inc., an organisation advocating for better child protection in Australia. She is a lobbyist, who often highlights and promotes action against pedophilia within media, families, schools and in the general community. She declared in September 2012 a desire "to make Australia the safest place in the world for children".
Johnston has published a book detailing her beliefs called In the Best Interests of the Child. Hetty Johnston has been named the QLD Australian of the Year 2015.