John Bromley (c.1682-20 October 1718), of Horseheath Hall, Cambridgeshire, was an English politician.
He was born the son of John Bromley and educated at Clare College, Cambridge. He inherited estates in Cambridgeshire and Barbados from his father in 1707 and served as High Sheriff of Cambridgeshire and Huntingdonshire for 1704–05.
He was a Member (MP) of the Parliament of Great Britain for Cambridgeshire 4 December 1707 - 20 October 1718.
He died at Horseheath Hall, aged 36, and was buried at Horseheath parish church. He had married Mercy and had one son, Henry, who became the 1st Baron Montfort. In his will he specified that the Horseheath estate should be completed in accordance with his plans.