The Watson, later Kay Baronetcy, of East Sheen in the County of Surrey, was a title in the Baronetage of the United Kingdom. It was created on 5 December 1803 for the merchant and soldier Brook Watson, with remainder failing male issue of his own to his great-nephews William Kay and Brook Kay and the male issue of their bodies. Watson died unmarried and was succeeded according to the special remainder by his great-nephew William Kay, the third Baronet. The title became extinct on the death of the sixth Baronet in 1918.

Watson, later Kay Baronets, of East Sheen (1803)

• Sir Brook Watson, 1st Baronet (d. 1807)
• Sir William Kay, 2nd Baronet (d. 1850)
• Sir Brook Kay, 3rd Baronet (1780-1866)
• Sir Brook Kay, 4th Baronet (1820-1907)
• Sir William Algernon Kay, 5th Baronet (1837-1914)
• Sir William Algernon Ireland Kay, 6th Baronet (1876-1918)