List of authors by name: I
Abbreviations: ch = children's, d = drama, f = fiction, nf = non-fiction, p = poetry
A – B – C – D – E – F – G – H – I – J – K – L – M – N – O – P – Q – R – S – T – U – V – W – X – Y – Z- Lee Iacocca (1924–2019, US, nf)
- Eva Ibbotson (1925–2010, Austria/England, f/ch)
- Henrik Ibsen (1828–1906, Norway, d)
- Masuji Ibuse (????, 1898–1983, Japan, f)
- Ibn Idhari (early 14th c., Morocco, nf)
- Ido Reizan (????, 1859–1935, Japan, nf/p)
- Dafydd Ifans (born 1949, Wales, f)
- August Wilhelm Iffland (1759–1814, Germany, d)
- Conn Iggulden (born 1971, England, f)
- Ignatius of Antioch (c. 108–140 CE, Roman E, nf)
- Jakov Ignjatovi? (1822–1889, Serbia, f/nf)
- Ignotus (1869–1949, Hungary, p/f/nf), pseudonym of Hugó Veigelsberg
- Ihara Saikaku (????, 1642–1693, Japan, p/f)
- Dakotsu Iida (????, 1885–1962, Japan, p)
- Sh?tar? Ikenami (?????, 1823–1890, Japan, f)
- Natsuki Ikezawa (????, born 1945, Japan, p/f/nf)
- Ikky? (????, 1394–1481, Japan, nf/p)
- Attilâ ?lhan (1925–2005, Turkey, p/f/nf)
- Branislava Ili? (born 1970, Yugoslavia/Serbia, d/nf)
- Dragutin Ili? (1858–1926, Serbia/Yugoslavia, d/p/f)
- Jovan Ili? (1824–1901, Serbia, p)
- Vojislav Ili? (1860–1894, Serbia, p)
- Kalin Iliev (born 1956, Bulgaria, d/nf)
- Vasil Iljoski (1902–1995, Ottoman E/N Macedonia, d/nf)
- Gyula Illyés (1902–1983, Hungary, p/f)
- Maria Ilnicka (1825 or 1827–1897, Duchy of Warsaw, p/f/nf)
- Chris Impey (born 1956, Scotland/US, nf)
- Inagaki Manjir? (?????, 1861–1908, Japan, nf)
- Taruho Inagaki (????, 1900–1977, Japan, f)
- Elizabeth Inchbald (1753–1821, England, f/d)
- Mirjam Indermaur (born 1967, Switzerland, nf)
- Dean Ing (1931–2020, US, f)
- Rex Ingamells (1913–1955, Australia, p/f/nf)
- William Ralph Inge (1860–1954, England, nf), known as Dean Inge
- Jean Ingelow (1820–1897, England, p/f)
- Ingen Ry?ki (????, 1592–1673, Japan, nf/p)
- Elisabeth Inglis-Jones (1900–1994, Wales/England, f/nf)
- Thomas Ingoldsby (1788–1845, England, f/p), pseudonym of Richard Barham
- Anton Ingoli? (1907–1992, Austrian E/Yugoslavia)
- Anne Bower Ingram (1937–2010, Australia, ch)
- Simon Ings (born 1965, England, f/nf)
- Dimitar Inkiow (1932–2006, Bulgaria, d/f)
- Hisashi Inoue (?????, 1934–2010, Japan, d/f)
- Inoue Kenkab? (?????, 1870–1934, Japan, p/nf)
- Yasushi Inoue (???, 1907–1991, Japan, p/nf/f)
- Kurumi Inui (????, born 1963, Japan, f)
- Eugène Ionesco (1909–1994, Romania/France, d)
- Nae Ionescu (1890–1940, Romania, nf)
- Nicolae Iorga (1871–1940, Romania, nf/p/d)
- Irnerius (c. 1050 – post-1125, Italy, nf)
- Takehiro Irokawa (????, 1929–1989, Japan, f)
- Eric Irvin (1908–1993, Australia, p/nf)
- John Irving (born 1942, US/Canada, f/d)
- Washington Irving (1783–1859, US, f/nf)
- Norah Isaac (1914–2003, Wales, f/nf/d)
- Walter Isaacson (born 1952, US, nf)
- K?tar? Isaka (?????, born 1971, Japan, f)
- Antonije Isakovi? (1923–2002, Yugoslavia, f/nf)
- Lady Ise (??, c. 875 – c. 1938, Japan, p)
- Christopher Isherwood (1904–1986, England/US, f/d/nf)
- Ishibashi Ningetsu (????, 1865–1926, Japan, nf)
- Ira Ishida (????, born 1960, Japan, f)
- Ishigaki Rin (????, 1920–2004, Japan, p)
- Kazuo Ishiguro (????, born 1954, Japan/England, f/d)
- Fujio Ishihara (????, born 1933, Japan, f/nf)
- Shintaro Ishihara (?????, born 1932, Japan, f/nf)
- Jun Ishikawa (???, 1899–1987, Japan, f/nf)
- Takuboku Ishikawa (????, 1886–1912, Japan, p)
- Tatsuz? Ishikawa (????, 1905–1985, Japan, nf)
- Ishin S?den (????, 1569–1633, Japan, nf)
- Tomoji Ishizuka (????, 1906–1984, Japan, p/f)
- Elizabeth Isichei (born 1939, N Zealand/Nigeria, nf)
- Auguste Villiers de l'Isle-Adam (1838–1889, France, p/f/d)
- Petre Ispirescu (1830–1887, Wallachia/Romania, nf)
- Issan Ichinei (?? ??, 1247–1317, China/Japan, nf), name pronounced Yishan Yining in Chinese
- Panait Istrati (1884–1935, Romania, nf/f)
- Einosuke It? (?? ???, 1903–1959, Japan, nf)
- Hiromi It? (?????, born 1955, Japan, p/nf)
- Junji It? (????, born 1963, Japan, f)
- Keikaku It? (Project Itoh ????, 1974–2009, Japan, f/nf)
- It? Noe (????, 1895–1923, Japan, nf)
- It? Sachio (?????, 1864–1913, Japan, p/f), pseudonym of It? K?jir? (?????)
- Takami It? (?????, born 1971, Japan, f/ch)
- Akiko Itoyama (????, born 1966, Japan, f)
- Ivan Ivani? (1867–1935, Austria-Hungary/Yugoslavia, nf)
- Ivan Ivanji (born 1929, Yugoslavia/Austria, f)
- Alexandru Ivasiuc (1933–1977, Romania, f)
- Pavle Ivi? (1924–1999, Yugoslavia, nf)
- Judith Ivory (living, US, f), pseudonym of Judy Cuveas
- Violeta Ivkovi? (born 1957, Yugoslavia/Serbia, f)
- Emrys ap Iwan (1848–1906, Wales, nf),
- Motohiko Izawa (????, born 1954, Japan, f)
- Jacques Izoard (1936–2008, Belgium, p/nf)
- Ky?ka Izumi (???, 1873–1939, Japan, f/d)
- Izumi Shikibu (????, born c. 976, Japan, p)
- Izumo no Okuni (????, c. 1578–1613, Japan, d)