A
| Title | Date of creation | Surname | Current status | Notes |
|---|---|---|---|---|
| Abdy of Albyns | 1849 | Abdy | extant | |
| Abel of Whitehall Court | 1893 | Abel | extinct 1902 | |
| Ackroyd of Dewsbury | 1956 | Ackroyd | extant | Lord Mayor of London |
| Acland of Oxford | 1890 | Acland | extant | |
| Adair of Flixton Hall | 1838 | Adair | extinct 1988 | |
| Adam of Blair | 1882 | Blair | extinct 1922 | |
| Adam of Hankelow | 1917 | Adam | extant | |
| Agnew of Clendry | 1957 | Agnew | extant | |
| Agnew of The Planche | 1895 | Agnew | extant | |
| Ainsley of Great Torrington | 1804 | Ainsley | extinct 1858 | |
| Ainsworth of Ardanaiseig | 1917 | Ainsworth | extant | |
| Aird of London | 1901 | Aird | extant | |
| Aitchison of Lemmington | 1938 | Aitchison | extant | |
| Aitken of Chirkley | 1916 | Aitken | extant | first Baronet created Baron Beaverbrook in 1917 |
| Albu of Johannesburg | 1912 | Albu | extant | |
| Alexander of Ballochmyle | 1886 | Alexander, Hagart-Alexander | extant | |
| Alexander, later Cable-Alexander of Belcamp | 1809 | Alexander, Cable-Alexander | dormant | seventh Baronet died 1988 |
| Alexander of Edgehill | 1921 | Alexander | extant | |
| Alexander of Sundridge Park | 1945 | Alexander | extant | Lord Mayor of London |
| Alison of Possil House | 1852 | Alison | extinct 1970 | |
| Allan of Kinsgate | 1819 | Allan | extinct 1820 | |
| Allen of Marlow | 1933 | Allen | extinct 1939 | |
| Allsopp of Alsop-le-Dale | 1880 | Allsopp | extant | first Baronet created Baron Hindlip in 1880 |
| Anderson of Ardtaraig | 1919 | Anderson | extinct 1942 | |
| Anderson of Fermoy | 1813 | Anderson | extinct 1861 | |
| Anderson of Harrold Priory | 1920 | Anderson | extinct 1963 | |
| Anderson of Mullaghmore House | 1911 | Anderson | extinct 1921 | Lord Mayor of Belfast |
| Andrews of Comber | 1942 | Andrews | extinct 1951 | |
| Anson of Hatch Beauchamp | 1831 | Anson | extant | |
| Anstruther-Gough-Calthorpe of Elveham | 1929 | Anstruther-Gough-Calthorpe | extant | |
| Anstruther-Gray of Kilmany | 1956 | Anstruther-Gray | extinct 1985 | first Baronet created a life peer as Baron Kilmany in 1966 |
| Antrobus of Antrobus Hall | 1815 | Antrobus | extant | |
| Arbuthnot of Edinburgh | 1823 | Arbuthnot | extant | Lord Provost of Edinburgh |
| Arbuthnot of Kittybrewster | 1964 | Arbuthnot | extant | |
| Archdale of Riversdale | 1928 | Archdale | extant | |
| Armstrong of Ashburn Place | 1892 | Armstrong | extinct 1944 | |
| Armstrong of Gallen Priory | 1841 | Armstrong | extant | |
| Arnott of Baily | 1896 | Arnott | extant | |
| Arthur of Carlung | 1903 | Arthur | extant | first Baronet created Baron Glenarthur in 1918 |
| Arthur of Upper Canada | 1841 | Arthur | extant | |
| Ashman of Thirmlere | 1907 | Ashman | extinct 1916 | |
| Aske of Aughton | 1922 | Aske | extant | |
| Assheton of Downham | 1945 | Assheton | extant | second Baronet had been created Baron Clitheroe in 1955 prior to succeeding to the baronetcy |
| Astley of Everley | 1821 | Astley | extinct 1994 | |
| Astley-Cooper of Gadebridge | 1821 | Astley-Cooper | extant | |
| Austin of Red Hill | 1894 | Austin | extant | |
| Avery of Oakley | 1905 | Avery | extinct 1918 | |
| Aykroyd of Bristwith Hall | 1929 | Aykroyd | extant | |
| Aykroyd of Lightcliffe | 1920 | Aykroyd | extant | |
| Aylwen of St Bartholomews | 1949 | Aylwen | extinct 1967 | Lord Mayor of London |
Read more about this topic: List Of Baronetcies In The Baronetage Of The United Kingdom