There have been two baronetcies created for members of the St Aubyn family, one in the Baronetage of England and one in the Baronetage of the United Kingdom.
The St Aubyn Baronetcy, of Clowance in the County of Cornwall, was created in the Baronetage of England on 11 December 1671 for John St Aubyn, who later represented St Michaels in the House of Commons. The second Baronet sat as Member of Parliament for Helston, the third Baronet for Cornwall, the fourth Baronet for Launceston and Cornwall and the fifth Baronet for Truro, Penrhyn and Helston. The title became extinct on the latter's death in 1839. His daughter and co-heir was the mother of Reverend Hender Molesworth, who in 1844 assumed by Royal licence the additional surname of St Aubyn and was the father of Sir St Aubyn Hender Molesworth-St Aubyn, 12th Baronet (see Molesworth-St Aubyn Baronets).
The St Aubyn Baronetcy, of St Michael's Mount in the County of Cornwall, was created in the Baronetage of the United Kingdom on 31 July 1866 for Edward St Aubyn. He was the illegitimate son of the fifth and last Baronet of the 1671 creation. For more information on this creation, see Baron St Levan.