Sir Arthur Acheson 5th Baronet (26 January 1688 – 8 February 1748) was an Irish politician and baronet.

The son of Sir Nicholas Acheson, 4th Baronet, he succeeded to the baronet

Baronet

A baronet or the rare female equivalent, a baronetess , is the holder of a hereditary baronetcy awarded by the British Crown...

cy upon the death of his father. In 1728, he was appointed High Sheriff of Armagh

High Sheriff of Armagh

The High Sheriff of Armagh is the Sovereign's judicial representative in County Armagh. Initially an office for lifetime, assigned by the Sovereign, the High Sheriff became annually appointed from the Provisions of Oxford in 1258...

. Acheson sat in the Irish House of Commons

Irish House of Commons

The Irish House of Commons was the lower house of the Parliament of Ireland, that existed from 1297 until 1800. The upper house was the House of Lords...

 for Mullingar

Mullingar (Parliament of Ireland constituency)

Mullingar was a constituency represented in the Irish House of Commons from 1612 to 1800.-1692–1801:...

 from 1727 until his death in 1748.

He married Anne Savage in 1715, with whom he had the following children:

• Nicholas Acheson (b. bef. 1716-1717)
• Philip Acheson (b. bef. 1718-1727)
• Archibald Acheson, 1st Viscount Gosford
  Archibald Acheson, 1st Viscount Gosford
  Achibald Acheson 1st Viscount Gosford PC , known as Sir Achibald Acheson, 6th Bt from 1748 to 1776, was an Irish peer and politician.-Life:...
  
  (1718-1790)
• Nicola Acheson (b. 1725)
• Ann Acheson