John Beynon may refer to:
- Sir John Beynon, 1st Baronet (1864–1944), Welsh industrialist
- A pen name of the British novelist John Wyndham Parkes Lucas Beynon Harris (1903–1969)
- John Beynon (academic) (born 1939) Principal of King's College London (1990–1992)
- John H. Beynon, Welsh scientist in the field of mass spectrometry
- John Beynon (poet)