Sir John Campbell Allen (October 1, 1817 – September 27, 1898) was from 1865–1896 a Supreme court justice of the colonial New Brunswick Supreme Court, serving as Chief Justice of New Brunswick

Chief Justice of New Brunswick

The Chief Justice of the Province of New Brunswick, Canada holds the highest office within the Province's judicial system. He/she is part of the Court of Appeal, the highest court in the Province which includes five other judges plus any former judge of the Court of Appeal who is a supernumerary...

 from 1875 to 1896.

He was born in Kingsclear Parish, New Brunswick

Kingsclear, New Brunswick

Kingsclear is a Canadian rural community in York County, New Brunswick.Located on the west bank of the Saint John River, 20 kilometres west of the city of Fredericton and opposite Keswick Ridge, the community includes several cottage areas along the Mactaquac Headpond and a residential subdivision...

, a grandson of Isaac Allen, a New Brunswick Supreme Court judge. He studied law in the office of John Simcoe Saunders.

He was a member of the New Brunswick House of Assembly

Legislative Assembly of New Brunswick

The Legislative Assembly of New Brunswick is located in Fredericton. It was established de jure when the colony was created in 1784, but only came in to session in 1786 following the first elections in late 1785. Until 1891, it was the lower house in a bicameral legislature when its upper house...

 from 1856 to 1865, Solicitor General

Office of the Attorney General (New Brunswick)

The Office of the Attorney General is a part of the Government of New Brunswick. It is charged providing legal services to all departments and agencies of the government....

 in 1856 to 1857, Speaker of the House

Speaker of the Legislative Assembly of New Brunswick

The Speaker of the Legislative Assembly of New Brunswick is the presiding officer of the provincial legislature. Since 1994 the position has been elected by MLAs using a secret ballot. Previously, the Speaker had been appointed by motion of the house, in practice moved by the Premier of New...

 from 1863 to 1865, and Attorney General

Office of the Attorney General (New Brunswick)

The Office of the Attorney General is a part of the Government of New Brunswick. It is charged providing legal services to all departments and agencies of the government....

in 1865.