Tiarks may refer to:
- Frank Cyril Tiarks, British banker
- Geoffrey Lewis Tiarks, Bishop of Maidstone, England
- Henrietta Joan Tiarks, Dowager Duchess of Bedford, England
- Johann Ludwig Tiarks, German astronomer in British service, who surveyed the Canada–United States border in the 19th century
- John Tiarks, Anglican churchman
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