There have been nineteen baronetcies created for persons with the surname Hamilton, eight in the Baronetage of Nova Scotia, one in the Baronetage of England, five in the Baronetage of Ireland, one in the Baronetage of Great Britain and four in the Baronetage of the United Kingdom. As of 2008 two creations are extant, two are dormant, two are either extinct or dormant and twelve extinct.
The Hamilton Baronetcy, of West Port, was created in the Baronetage of Nova Scotia in 1627 for the Hon. William Hamilton. He was the second son of James Hamilton, 1st Earl of Abercorn (see the Duke of Abercorn for earlier history of the family). The title became either extinct or dormant on Hamilton's death in circa 1680.
The Hamilton Baronetcy, of Killock in the County of Down (according to other sources the territorial designation was "of Killaugh in the County of Cavan"), was created in the Baronetage of Nova Scotia on 29 September 1628 for Francis Hamilton. He represented Jamestown and County Cavan in the Irish House of Commons. His son, the second Baronet, was a Member of the Irish Parliament for County Donegal. He was succeeded by his son, the third Baronet. He also represented County Cavan in the Irish Parliament. The title became either extinct or dormant on his death in 1714.
The Hamilton Baronetcy, of Broomhill, was created in the Baronetage of Nova Scotia on 6 January 1635 for James Hamilton. For more information on this creation, see Lord Belhaven and Stenton. See also the Hamilton Baronetcy of Rosehall below.