Sir Anthony John Charles Meyer, 3rd Baronet was a British soldier, diplomat, and Conservative and later Liberal Democrat politician, best known for standing against Margaret Thatcher for the party leadership in 1989. In spite of his staunch conservative views on economic policy, his passionate support of increased British integration into the European Union led to him becoming increasingly marginalised in Thatcher's Conservative Party.

The 1989 Conservative Party leadership election took place on 5 December 1989. The incumbent Margaret Thatcher was opposed by the little-known 69-year-old backbencher MP Sir Anthony Meyer. It was the Conservative Party's first leadership election for nearly 15 years, when Thatcher had taken the party leadership.