The Richardson, later Stewart-Richardson Baronetcy, of Pencaitland in the County of Haddington, is a title in the Baronetage of Nova Scotia. It was created on 13 November 1630 for Robert Richardson, with remainder to his heirs male whatsoever. The title was dormant from c. 1640-c. 1678, 1752-c. 1783 and 1821-1837. The thirteenth Baronet was the son of Elizabeth, eldest daughter and co-heir of James Stewart, and assumed the additional surname of Stewart.

Richardson, later Stewart-Richardson Baronets, of Pencaitland (1630)

• Sir Robert Richardson, 1st Baronet (d. 1635)
• Sir Robert Richardson, 2nd Baronet (1613- c. 1640)

dormant c. 1640-c. 1678

• Sir James Richardson, 3rd Baronet (d. 1680)
• Sir James Richardson, 4th Baronet (d. 1717)
• Sir James Richardson, 5th Baronet (d. 1731)
• Sir William Richardson, 6th Baronet (d. 1747)
• Sir Robert Richardson, 7th Baronet (d. 1752)

dormant 1752-c. 1783

• Sir James Richardson, 8th Baronet (d. 1788)
• Sir George Richardson, 9th Baronet (d. 1791)
• Sir George Preston Richardson, 10th Baronet (c. 1778-1803)
• Sir James Richardson, 11th Baronet (d. 1804)
• Sir John Charles Richardson, 12th Baronet (c. 1785-1821)

dormant 1821-1837

• Sir John Stewart-Richardson, 13th Baronet (1797–1881)
• Sir James Thomas Stewart-Richardson, 14th Baronet (1840–1895)
• Sir Edward Austin Stewart-Richardson, 15th Baronet (1872–1914)
• Sir Ian Rorie Hay Stewart-Richardson, 16th Baronet (1904–1969)
• Sir Simon Alaisdair Stewart-Richardson, 17th Baronet (b. 1947)