Events from the year 1784 in art.

• July 30 – Adolf Ulrik Wertmüller is elected to the Académie royale de peinture et de sculpture in Paris.^[1]
• date unknown – Thomas Chippendale, the younger, begins exhibiting his paintings at the Royal Academy.

• John Bacon – seated sculpture of Sir William Blackstone (Codrington Library, All Souls College, Oxford, England)
• James Barry – The Progress of Human Culture (completed series in Great Room of Society for the Encouragement of Arts, Manufactures and Commerce in London)
• Antonio Carnicero – Ascent of Monsieur Bouclé's Montgolfier Balloon in the Gardens of Aranjuez
• Jacques-Louis David – Oath of the Horatii (Musée du Louvre, Paris)
• Thomas Gainsborough
  • John Hobart, 2nd Earl of Buckinghamshire and his wife Caroline Connolly
  • Frances Browne, Mrs John Douglas
• Louise Élisabeth Vigée Le Brun – Two portraits of the Comte de Vaudreuil
• Charles Willson Peale
  • General Benjamin Lincoln
  • Washington, Lafayette & Tilghman at Yorktown (the "Annapolis portrait")
• George Romney – Sir William Hamilton
• Gilbert Stuart – Portrait of Sir Joshua Reynolds
• John Webber – Death of Cook
• Johann Zoffany – Portrait of Claud Alexander with his brother Boyd, attended by an Indian servant

• January 21 – Peter De Wint, English landscape painter (died 1849)
• February 29 – Leo von Klenze, German neoclassicist architect, painter and writer (died 1864)
• May 4 – Rubens Peale, American artist and museum director (died 1865)
• June 4 – François Rude, French sculptor (died 1855)
• July 11 – Paul Joseph Gabriël, Dutch painter and sculptor (died 1833)
• September 23 – Peter von Cornelius, German painter (died 1867)
• October – Sarah Biffen, disabled English painter (died 1850)
• November 3 – Antonín Mánes, Czech painter (died 1843)
• November 21 – Gustaf Wilhelm Finnberg, Finnish painter (died 1833)
• November 28 – Claude Victor de Boissieu, French artist and local politician (died 1868)
• December 26 – Antoni Brodowski, Polish Neo-classicist painter and pedagogue (died 1832)
• date unknown
  • John Cox Dillman Engleheart, English miniature painter (died 1862)
  • William Essex, English enamel-painter (died 1869)
  • Charles Gough, English landscape artist (died 1805)
  • Ernestine Panckoucke, French botanical illustrator and flower painter (died 1860)
  • Stepan Pimenov, Russian sculptor (died 1833)
  • Jacopo Tumicelli, Italian portrait miniature painter (died 1825)

• January 17 – Yosa Buson, Japanese poet and painter (born 1716)^[2]
• May 29 – George Barret, Sr., Irish landscape artist best known for his portraits of the British countryside (born 1730)
• July 15 – Johann Baptist Straub, German Rococo sculptor (born 1704)
• August 10 – Allan Ramsay, Scottish portrait-painter (born 1713)
• August 14 – Nathaniel Hone, British portrait painter (born 1718)
• September 7 – Andrea Casali – Italian painter of the Rococo period (born 1705)^[3]
• September 15 – Nicolas Bernard Lépicié, French painter (born 1735)
• October 29 – Giuseppe Zais, Italian painter of landscapes (vedutisti) (born 1709)
• date unknown
  • Antonio Beltrami, Italian painter (born 1724)
  • Giuseppe Bottani, Italian painter (born 1717)
  • Simon Fokke, Dutch designer, etcher and engraver (born 1712)
  • John Foldsone, English portrait painter (born unknown)
  • Stefano Torelli, Italian painter of altar-pieces and ceiling decorations (born 1712)