John Winslow may refer to:
- John Winslow (1597–1674)
- John Winslow (British Army officer) (1703–1774), major-general of the colonial militia during the French and Indian War
- John F. Winslow (1810 - 1892), American businessman and iron manufacturer
- John Ancrum Winslow (1811-1873), American rear admiral
- John B. Winslow (1851-1920), American jurist