Māori Women's Welfare League
The strategic partnership is the first between Oranga Tamariki and a national Māori organisation.
It already has existing agreements with four iwi, including Ngāi Tahu, Ngāpuhi, Waikato-Tainui and Tūhoe.
The partnerships are designed to place vulnerable Māori children with carers they have a whakapapa connection to.
Māori Women's Welfare League president Prue Kapua said she hoped the two organisations would collectively be able to uphold the mana of tamariki and rangatahi that included whānau in the process.