Wingnut may refer to:

• Wingnut, (Pterocarya), a genus of trees bearing winged nuts.
• A wingnut or wing nut, a nut (hardware), with a pair of wings for increasing torque.
• Wingnut (politics), a mildly derogatory term for a person who holds either right-wing or left-wing political beliefs.
• Wingnut ear, a derogatory term for, or a person with, ears that stick out
• WingNut Films, New Zealand director Peter Jackson's film production company

Wingnut