John Warden Brooke, 2nd Viscount Brookeborough, PC (NI) (9 November 1922 – 5 March 1987), was a Northern Irish politician.
In 1934, his father claimed in the House of Commons of Northern Ireland at Stormont that there had been a plot to kidnap the young John Brooke by Irish Republicans during Sir Basil Brooke's time as Commandant of the Ulster Special Constabulary (USC).
This report led Sir Basil (as he then was) to dismiss every Catholic worker in his employ, for which he was accused of sectarianism.
Brookeborough (when he was still Captain Brooke) was a member of a dissident group of Ulster Unionist backbench MPs who campaigned for the removal of Terence O'Neill as Prime Minister of Northern Ireland.
When O'Neill finally resigned in April 1969 his successor, Major James Chichester-Clark, brought some of this dissident group into his government.
Under Brian Faulkner's premiership, he was Government Chief Whip (1971–1972) and also served in the Cabinet from 1971 as Minister of State in the Ministry of Finance.