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. (August 2013)
This article presents lists of the literary events and publications in 1820.
- January 16 – Poems Descriptive of Rural Life and Scenery by "Northamptonshire peasant poet" John Clare is published in England by John Taylor.
- April 22 – Walter Scott is created 1st baronet of Abbotsford in the County of Roxburgh in the Baronetage of the United Kingdom.
- September – Poet John Keats, suffering from tuberculosis, leaves London to take up residence in the house on the Spanish Steps in Rome where he will die in 1821.
- November 20 – An 80-ton sperm whale attacks the Essex, a whaleship from Nantucket, Massachusetts, 2,000 miles off the western coast of South America. Herman Melville's 1851 novel Moby-Dick is in part inspired by this story.
- Robert Chambers's publishing company publishes The Songs of Robert Burns.
- Thomas Kendall has the first book printed in the Māori language, A korao no New Zealand; or, the New Zealander's first book; being an attempt to compose some lessons for the instruction of the natives, published in Sydney, Australia.
- First translation of the Old English epic poem Beowulf into a modern language, Danish, Bjovulfs Drape, made by N. F. S. Grundtvig.
- The Cambridge Apostles, an intellectual discussion group, is established at the University of Cambridge in England.
- Maria Hack
- English Stories, illustrating some of the most interesting events and characters between the Accession of Alfred and the Death of John
- English Stories. Second series, between the Accession of Henry the Third and the Death of Henry the Sixth
- Mary Shelley – Maurice, or the Fisher's Cot (written 1820 then lost, published 1997)
- January 17 – Anne Brontë, English novelist and poet (died 1849)
- February 28 – John Tenniel, English illustrator and cartoonist (died 1914)
- March 2 – Multatuli (Eduard Douwes Dekker), Dutch writer (died 1887)
- March 17 – Jean Ingelow, English poet and novelist (died 1897)
- March 30 – Anna Sewell, English novelist (died 1878)
- April 4 – Mkrtich Khrimian, Armenian Catholicos, essayist and poet (died 1907)
- April 26 – Alice Cary, American poet and short-story writer (died 1871)
- June 21 – James Halliwell-Phillipps, English bibliophile (died 1889)
- August 13 – Sir George Grove, English writer and lexicographer on music (died 1900)
- September 17 – Émile Augier, French dramatist (died 1889)
- October 14 – John Harris, English poet (died 1884)
- November 23 – Afanasy Fet, Russian poet, essayist and short-story writer (died 1892)
- November 28 – Friedrich Engels, German socialist writer (died 1895)