James Tuchet, 6th Earl of Castlehaven (died 12 October 1740) was the son of James Tuchet, 5th Earl of Castlehaven and his wife Anne Pelson.
[1] He succeeded his father as Earl of Castlehaven and Baron Audley on 9 August 1700.
He married, on 14 May 1722, Elizabeth Arundell (1693–1743), daughter of Henry Arundell, 5th Baron Arundell of Wardour[2] and his wife, née Elizabeth Panton.
They had two sons and at least one daughter: He is buried at the church of St. Sulpice in Paris, France.