Thanet may refer to:

• Isle of Thanet, a former island, now a peninsula, at the most easterly point of Kent, England
• Thanet District, a local government district containing the island
• Thanet College, former name of East Kent College
• Thanet Canal, a short branch of the Leeds and Liverpool Canal
• Earl of Thanet, a title in the Peerage of England created in 1628
• Thanet Formation, a geological formation found in the London Basin of southeastern England
• HMS Thanet (H29), an S-class destroyer of the Royal Navy
• Thanet Wind Farm, an offshore wind farm 7 miles (11 km) off the coast of Thanet district in Kent, England

• Thanetian, in the ICS Geologic timescale, the latest age or uppermost stratigraphic stage of the Paleocene Epoch