<ref>{{cite book |author=H. L. Mallalieu |title=The Dictionary of British Watercolour Artists up to 1920|year=1986|publisher=Antique Collectors' Club|isbn=1-85149-025-6|page=}}</ref>
Edwin Austin Abbey- Henry Abbot (painter)
- John White Abbott
- Hepzibah Abney
- Francis Xavier Abraham
- Frederick Henry Abraham (painter) (1790–1845)
- Lilian Abraham
- John Absolon
- John de Mansfield Absolon ULAN 500123562
- Louis de Mansfield Absolon
- Henry Wentworth Acland
- Sir Thomas Dyke Acland, 10th Baronet
- Walter William Acock YP
- William Henry Acraman
- James Adam (architect)
- Joseph Denovan Adam (1842–1896) YP, RKD 353, ULAN 500009885; also son Joseph Denovan Adam the younger, animal painter
- Robert Adam
- Albert George Adams
- Caroline Adamss YP, Charlotte Adams (painter) and Lucy Adams RKD 401, ULAN 500021264, BMT
- Charles James Adams
- James Adams (architect) born 1785, Colvin
- James L. Adams (painter) RKD 393
- John Clayton Adams
- William Dacres Adams 1864-1951 YP RKD ULAN BMT
- Miss A Adamson
- Charles Murray Adamson
- William Adamson (watercolourist) 1818-1892, elder brother of Charles Murray Adamson
- William Grylls Addison
- John Miller Adye
- William Affleck RKD 616
- Agostino Maria Aglio YP
- Edmund Aikin
- George Aikman YP
- Henry Francis Ainsley
- Samuel James Ainsley, Samuel Ainsley RKD ULAN BMT fr:Samuel James Ainsley; worked with George Dennis (explorer)
- James Aitken (watercolourist) died c.1935, father of John Ernest Aitken
- James Alfred Aitken YP Draft:James Alfred Aitken
- Patricia Emma Alabaster
- Albert Charles Augustus Emmanuel
- Eleazar Albin
- Paul Alday
- Cecil Charles Windsor Aldin
- Robert Dawes Aldrich
- Frederick James Aldridge YP
- John Alefounder
- Edwin John Alexander YP
- George Alexander (watercolourist) 1832-1913
- Herbert Alexander
- John Alexander (painter)
- Robert Graham Dryden Alexander
- William Alexander (painter)
- Queen Alexandra
- Marianne Margaret, Viscountess Alford
- Alice Maud Mary
- Henry Thomas Alken (1785–1851) ODNB
- Samuel Alken (1756–1815) ODNB
- Samuel Alken, Yr.
- Henry Gordon Alken - Samuel Henry Gordon Alken (1810–1894) ODNB
- Seffrien Alken, Yr.
- Sir Alexander Allan
- David Allan (painter)
- Jessy Allan
- Robert Weir Allan YP
- Sir William Allan
- Thomas Allason
- Charles Frederick Allbon
- William T. Allchin YP as William Allchin
- George Allen (watercolourist) 1798-1847
- Isabella Anne Allen
- John Whitacre Allen
- Joseph William Allen
- Thomas John Allen
- William Herbert Allen
- John Taylor Allerston YP
- Helen Allingham
- Thomas Allom
- Henry Curzon Allport
- William Douglas Almond lk
- Joseph Samuel Alpenny
- Fritz B. Althaus
- Sarah Elizabeth, Countess Amherst
- John Anderson (painter) 1835-1919
- John Farquharson Anderson
- Robert Anderson (painter) 1842-1885
- William Anderson (artist)
- Will Anderson (painter) London artist
- George Henry Andrews (painter) YP
- Henry Andrews (painter) c.1810-1868
- James Pettit Andrews
- Henry Anelay YP
- George French Angas
- Helen Cordelia Angell lk
- Maria L. Angus
- Charles Francis Annesley
- Charles Ansell (painter)
- Henry Mark Anthony
- George Owen Wynne Apperley YP
- George Arbuthnott
- John Wykeham Archer
- George Arden lk
- Margaret Elizabeth, Lady Arden
- Edward Armitage
- George Denholm Armour
- Fanny Armstrong
- Francis Abel William Taylor Armstrong YP
- Thomas Armstrong (painter)
- Charles Armytage
- Mary Elizabeth, Lady Armytage
- George Arnald
- Joseph Arnold
- Richard Hubbard Arroll
- William Artaud
- Francis Vyvyan Jago Arundale
- John Willsteed Ash
- George Ashburnham, 3rd Earl of Ashburnham
- George Percy Ashburnham
- Henry Pollard Ashby
- William Ashford
- Charles Ashmore YP
- Arthur Ashpitel
- William Hurst Ashpitel
- Henry Ashton (architect)
- Julian R. Ashton
- Susan A. Ashworth
- J. Aspinall
- Reginald Aspinwall
- Theophilus Lindsay Aspland
- William Assheton (painter) died 1833
- Henry Astley
- Charles Reginald Aston
- Ethel Atcherley
- Thomas Athow
- John Atkin (painter)
- Catherine J. Atkins
- Samuel Atkins
- William Edward Atkins YP
- Rev. Christopher Atkinson (painter) 1754-1795
- George Mounsey Wheatley Atkinson YP
- James Atkinson (Persian scholar)
- John Atkinson (painter) 1863-1924
- John Augustus Atkinson
- Robert Atkinson (painter) 1863-1896
- Thomas Witlam Atkinson
- William Atkinson (architect)
- Augusta Sophia
- Patrick C. Auld
- James Aumonier YP
- Henry Haversham Godwin-Austen
- James Austen, brother of Jane Austen
- H. Austin
- Samuel Austin (artist)
- William Austin (caricaturist)
- William Frederick Austin YP
- Charles Auty YP
- Heneage Finch, 4th Earl of Aylesford
- Louisa, Countess of Aylesford
- Albert William Ayling
- Thomas Brabazon Aylmer
- Sophia Ayrton
- W. Ayrton
