James Tuchet, 6th Earl of Castlehaven; 16th Baron Audley; 4th Baron Audley of Hely (d. 12 October 1740) was the son of James Tuchet, 5th Earl of Castlehaven and his wife Anne Pelson.

He succeeded his father as Earl of Castlehaven, Baron Audley, and Baron Audley of Hely on 9 August 1700.

He married, on 14 May 1722, Elizabeth Arundell (1693-1743), daughter of Henry Arundell and his wife, née Elizabeth Panton.

They had two sons, and at least one daughter:

  • James (1723-1769)
  • John (1724-1777)
  • Elizabeth

He is buried at St. Sulpice in Paris.

{| border="2" align="center" |- |width="30%" align="center"|Preceded by:
James Tuchet |width="40%" align="center"|Earl of Castlehaven |width="30%" align="center"|Followed by:
James Tuchet |}