{{short description|Extinct baronetcy in the Baronetage of the United Kingdom}} {{Use dmy dates|date=December 2023}} thumb|Escutcheon of the Key baronets The '''Key baronetcy''', of Thornbury in the County of Gloucester and of Denmark Hill in the County of Surrey, was a title in the Baronetage of the United Kingdom. It was created on 17 August 1831 for John Key, Lord Mayor of London between 1830 and 1831.<ref name="Foster">{{cite book |last1=Foster |first1=Joseph |title=The Baronetage and Knightage of the British Empire |date=1883 |publisher=Nichols and Sons |location=Westminster |pages=357-358 |url=https://archive.org/details/peeragebaronetag02fost/page/357/mode/1up}}</ref> The title became extinct on the death of the 4th Baronet in 1932.<ref name="WW4">{{Who's Who|title=Key, Sir Kingsmill James|id=U212303}}</ref>
==Key baronets, of Thornbury and Denmark Hill (1831)== *Sir John Key, 1st Baronet (1794–1858)<ref name="Foster"/> *Sir Kingsmill Grove Key, 2nd Baronet (1815–1899)<ref name="Foster"/><ref>{{Who's Who|title=Key, Sir Kingsmill Grove|id=U187815}}</ref> *Sir John Kingsmill Causton Key, 3rd Baronet (1853–1926)<ref>{{Who's Who|title=Key, Rev. Sir John Kingsmill Causton|id=U198822}}</ref> *Sir Kingsmill James Key, 4th Baronet (1864–1932). He left no heir.<ref name="WW4"/>
==References== {{reflist}}
{{s-start}} {{s-reg|uk-bt}} {{succession box | title= 20px<br />Key baronets<br /> ''of Thornbury and Denmark Hill'' | before= Macgregor baronets | years= 17 August 1831 | after= Greenhill-Russell baronets }} {{s-end}}
{{DEFAULTSORT:Key}} Category:Extinct baronetcies in the Baronetage of the United Kingdom