The Ministry of Social Development is the public service department of New Zealand charged with advising the New Zealand Government on social policy, and providing social services. MSD is the largest public service department, employing public servants in over 200 locations around New Zealand. MSD delivers its programmes and services through a number of business groups and agencies.

Oranga Tamariki, also known as the Ministry for Children and previously the Ministry for Vulnerable Children, is a government department in New Zealand responsible for the well-being of children, specifically children at risk of harm, youth offenders and children of the State. It is the successor agency of the former department, Child, Youth and Family (CYF).