Mary of Great Britain may refer to:

• Mary II (1662–1694), queen regnant of England, Scotland and Ireland
• Princess Mary of Great Britain (1723–1772), second-youngest daughter of King George II
• Mary of Teck (1867–1953), queen consort, queen dowager and queen mother of the United Kingdom
• Princess Mary, Duchess of Gloucester and Edinburgh (1776–1857), fourth daughter of King George III
• Mary, Princess Royal and Countess of Harewood (1897–1965), only daughter of King George V

• Princess Mary (disambiguation)
• Queen Mary (disambiguation)

This disambiguation page lists articles associated with the title Mary of Great Britain.
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