Dame Mavis McDonald, DCB (born 23 October 1944) is a British academic and civil servant.
She served as Permanent Secretary, Office of the Deputy Prime Minister and was named Dame Commander of the Order of the Bath (DCB) in 2004.
From 1995 to 2000, she served as Director General at the DOE and then the department for the Environment, Transport and the Regions (DETR).
She was named Permanent Secretary of the Cabinet Office, responsible for the Modernising Government agenda (2000-2002).
As an Under Secretary in the Department of the Environment on 2 September 1991 Mavis McDonald signed the Order to Dissolve Telford Development Corporation.