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

Crowan

Crowan is a village and civil parish in Cornwall, United Kingdom. It is situated approximately three-and-a-half miles south of Camborne. The River Hayle rises near Crowan and flows through the village and the railway branch to Helston passed nearby. Crowan has a population of 2,375...

 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

British House of Commons

The House of Commons is the lower house of the Parliament of the United Kingdom, which also comprises the Sovereign and the House of Lords . Both Commons and Lords meet in the Palace of Westminster. The Commons is a democratically elected body, consisting of 650 members , who are known as Members...

. The second Baronet sat as Member of Parliament

Member of Parliament

A Member of Parliament is a representative of the voters to a :parliament. In many countries with bicameral parliaments, the term applies specifically to members of the lower house, as upper houses often have a different title, such as senate, and thus also have different titles for its members,...

 for Helston

Helston (UK Parliament constituency)

Helston, sometimes known as Helleston, was a parliamentary borough centred on the small town of Helston in Cornwall.Using the bloc vote system of election, it returned two Members of Parliament to the House of Commons of England until 1707, then to House of Commons of Great Britain until 1800, and...

, the third Baronet for Cornwall

Cornwall (UK Parliament constituency)

Cornwall is a former county constituency covering the county of Cornwall, in the South West of England. It was a constituency of the House of Commons of England then of the House of Commons of Great Britain from 1707 to 1800 and of the House of Commons of the United Kingdom from 1801 to 1832...

, the fourth Baronet for Launceston

Launceston (UK Parliament constituency)

Launceston, also known at some periods as Dunheved, was a parliamentary constituency in Cornwall which returned two Members of Parliament to the British House of Commons from 1295 until 1832, and one member from 1832 until 1918...

 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

Molesworth-St Aubyn Baronets

The Molesworth, later Molesworth-St Aubyn Baronetcy, of Pencarrow near St Mabyn in Cornwall, is a title in the Baronetage of England. It was created on 19 July 1689 for Hender Molesworth, Governor of Jamaica....

).

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

Baron St Levan

Baron St Levan, of St Michael's Mount in the County of Cornwall, is a title in the Peerage of the United Kingdom. It was created on 4 July 1887 for the former Member of Parliament Sir John St Aubyn, 2nd Baronet. He had previously represented Cornwall West in House of Commons as a Liberal and St...

.

St Aubyn Baronets, of Clowance (1671)

• Sir John St Aubyn, 1st Baronet (1645–1687)
• Sir John St Aubyn, 2nd Baronet (1670–1714)
• Sir John St Aubyn, 3rd Baronet (c. 1702–1744)
• Sir John St Aubyn, 4th Baronet (1726–1772)
• Sir John St Aubyn, 5th Baronet
  Sir John St Aubyn, 5th Baronet
  Sir John St Aubyn, 5th Baronet , was a British Member of Parliament, High Sheriff of Cornwall and Grand Master of the Freemasons....
  
  (1758–1839)