The Maruia Society was an environmental organisation in New Zealand. "Maruia" means "sheltered valley" in the Maori language. (There is also a valley of that name in New Zealand's South Island.)
The Society had its origins in the Beech Forest Action Committee and the Native Forest Action Council. In 1999 it became the Ecologic Foundation.
Executive director was Guy Salmon who has been present through all the groups incarnations.
The Society lost a lot of members during the mid-late 1990s when it came out in support of sustainable milling of West Coast beech—in contrast to the mainstream environmental movement in New Zealand which was advocating against active management of the forests with money being channeled back into the forests for pest control.