The Napier baronetcy, of Merrion Square in the County of Dublin, was created in the Baronetage of the United Kingdom on 9 April 1867 for the Conservative politician, and former Lord Chancellor of Ireland, Joseph Napier.

Napier baronets, of Merrion Square (1867) Sir Joseph Napier, 1st Baronet (1804–1882) Sir Joseph Napier, 2nd Baronet (1841–1884) Sir William Lennox Napier, 3rd Baronet (1867–1915) Sir Joseph William Lennox Napier (1895–1986) Sir Robert Surtees Napier, 5th Baronet (1932–1994) Sir Charles Joseph Napier, 6th Baronet (born 1973)

The heir apparent is Finnian John Lennox Napier (born 2006), elder son of the 6th Baronet.

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