The Blunt Baronetcy, of London, is a title in the Baronetage of Great Britain. It was created on 17 June 1720 for John Blunt. He was a director of the South Sea Company. His great-grandson, the fourth Baronet, represented Lewes in the House of Commons from 1831 to 1840. His line of the family failed on the death of his son, the fifth Baronet, in 1847. The late Baronet was succeeded by his first cousin, the sixth Baronet. He was the son of Richard Charles Blunt, second son of the third Baronet. He died unmarried and was succeeded by his first cousin, the seventh Baronet. He was the son of William Blunt, third son of the third Baronet. He died childless and was succeeded by his younger brother, the eighth Baronet. He fought in the Indian Rebellion of 1857. The baronetcy descended in the direct line until the death of his grandson, the tenth Baronet, in 1969. He was succeeded by his younger brother, the eleventh Baronet. As of 2007 the title is held by the latter's son, the twelfth Baronet, who succeeded in 1975.
Another member of the family was Major-General Charles Harris Blunt (1825-1900), grandson of Walter Blunt, younger son of the second Baronet. His son Lieutenant-Colonel Edward Walter Blunt (1869-1949) married Sibell Lilian Blunt-Mackenzie, 3rd Countess of Cromartie. Consequently, their grandson John Ruaridh Grant Mackenzie, 5th Earl of Cromartie, is also in remainder to the Blunt Baronetcy of London.