Frank Arthur Calder, OC OBC (August 3, 1915 – November 4, 2006) was a Nisga'a politician in Canada.

He died November 4, 2006, at an assisted-living home in Victoria from the effects of cancer and recent abdominal surgery.

In 1973, police found him in a consensual situation involving a female companion, alcohol and a car parked in an intersection.

[1] In 1975, Calder crossed the floor to join the Social Credit Party of British Columbia and was re-elected.

By appealing the case all the way to the Supreme Court of Canada, Calder established that Aboriginal title exists in modern Canadian law.