Baron Northbrook, of Stratton in the County of Southampton, is a title in the Peerage of the United Kingdom. It was created in 1866 for the Liberal politician and former Chancellor of the Exchequer, Sir Francis Baring, 3rd Baronet. The holders of the barony represent the genealogically senior branch of the prominent Baring family. The name Northbrook is derived from a tithing of the local parish.
The holders of the barony descend from Francis Baring, whose father had emigrated to Great Britain from Germany. Francis was the founder of the family firm that grew into Barings Bank. The firm increased in wealth and influence to the point that, on 29 May 1793, Francis was created a baronet, of Larkbeer in the County of Devon, in the Baronetage of Great Britain. His eldest son Thomas became the second Baronet, also representing Chipping Wycombe and Hampshire in the House of Commons. Sir Thomas was succeeded by his eldest son Francis, third Baronet. Sir Francis held office as Chancellor of the Exchequer and First Lord of the Admiralty. In 1866 he was raised to the Peerage of the United Kingdom as Baron Northbrook, of Stratton in the County of Southampton.