John Trenchard (c. 1586 – 1662) of Warmwell, near Dorchester was an English politician who sat in the House of Commons at various times between 1621 and 1659.
Trenchard was born in Charminster, near Dorchester, the son of Sir George Trenchard of Warmwell and his wife Ann née Speke, daughter of Sir George Speke of White Lackington.
[2] In April 1640, Trenchard was re-elected MP for Wareham in the Short Parliament and elected again for the same constituency for the Long Parliament in November 1640, sitting until 1653.
[3] Trenchard died in London and was buried at Warmwell.
His daughter Jane married John Sadler, Master of Magdalene College, Cambridge, and his daughter Grace married William Sydenham.