Ada Elizabeth Deer was an American scholar and civil servant who was a member of the Menominee Indian Tribe of Wisconsin and a Native American advocate. As an activist she opposed the federal termination of tribes from the 1950s. During the Clinton administration, Deer served as Assistant Secretary of the Interior for Indian Affairs. Due to all of her advocacy and organization on behalf of Native people, she was recognized as a social work pioneer by the National Associate of Social Workers in 2010.

The Menominee are a federally recognized tribe of Native Americans officially known as the Menominee Indian Tribe of Wisconsin. Their land base is the Menominee Indian Reservation in Wisconsin. Their historic territory originally included an estimated 10 million acres (40,000 km2) in present-day Wisconsin and the Upper Peninsula of Michigan. The tribe currently has about 8,700 members.