The following is a List of authors by name whose last names begin with O: Abbreviations: ch = children's; d = drama, screenwriting; f = fiction; nf = non-fiction; p = poetry, song lyrics 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

Oa/Ok

• Rachid O. (Morocco/France, f) • Ann Oakley (born 1944, England, nf/f) • Graham Oakley (born 1929, England, ch) • John Oakman (c. 1748–1793, England, f/nf) • María Olimpia de Obaldía (1891–1985, Panama, p) • Barack Obama (born 1961, US, nf) • Michelle Obama (born 1964, US, nf) • Kate O'Beirne (1949–2017, US, nf) • Nadège Noële Ango-Obiang (born 1973, Gabon, f/d/p) • Chigozie Obioma (born 1986, Nigeria/US, f) • Obiwu (born 1962, Nigeria/US, nf), full name Obioma Paul Iwuanyanwu • Rafael Obligado (1851–1920, Argentina, p/d) • Godspower Oboido (born 1988, Nigeria, p/nf) • Dositej Obradović (1739–1811, Habsburg E/Ottoman E, nf) • Téa Obreht (born 1985, Yugoslavia/US, f/nf) • Princess Anka Obrenović (1821–1868, Serbia, nf) • Tor Obrestad (1938–2020, Norway, f/p/nf) • Patrick O'Brian (1914–2000, England/Ireland, f), born Richard Patrick Russ • Fitz James O'Brien (1828–1862, Ireland/US, f/p) • Flann O'Brien (1911–1966, Ireland, f/nf) • John O'Brien (1878–1952, Australia, p/nf), pseudonym of Patrick Joseph Hartigan • Michael O'Brien (born 1948, Canada, f/nf) • Robert C. O'Brien (1918–1973, US, f) • Sean O'Brien (born 1952, England, p/nf/d) • Sigbjørn Obstfelder (1866–1900, Norway, p/f/nf) • Mary-Louise O'Callaghan (living, Australia, nf) • Luis Moreno Ocampo (born 1952, Argentina, etc., nf) • Silvina Ocampo (1903–1993, Argentina, f/p) • Victoria Ocampo (1890–1979, Argentina, nf) • Thomas Occleve or Hoccleve (c. 1368–1426, England, p) • Raquel Ochoa (born 1980, Portugal, f/nf) • Moses Ochonu (living, Nigeria/US, nf) • Tyne O'Connell (born 1960, England, f/ch) • Elizabeth O'Conner (1913–2000, Australia, f/nf) • Arthur O'Connor (1763–1852, Ireland/France, nf) • Flannery O'Connor (1925–1964, US, f/nf) • Mark O'Connor (born 1945, Australia, p/nf) • Mary-Anne O'Connor (living, Australia, f) • Philip O'Connor (1916–1998, England/France, nf) • Roger O'Connor (1762-1834, Ireland/England, f/nf) • Okello Oculi (born 1942, Uganda/Nigeria, p/nf) • Julius Ocwinyo (born 1961, Uganda, p/f) • Sakunosuke Oda (織田作之助, 1913–1947, Japan, f/d/nf) • Asenath Bole Odaga (1937–2014, Kenya, f/d/ch) • Rosemary O'Day (born 1945, England, nf) • Constance O'Day-Flannery (living, US, f) • Scott O'Dell (1898–1989, US, f/ch) • Eisha Stephen Atieno Odhiambo (1945–2009, Kenya/US, nf) • Yervant Odian (1869–1926, Ottoman E/Egypt, nf/d) • Ike Odimegwu (living, Nigeria, nf) • Jaramogi Oginga Odinga (1911–1994, Kenya, nf) • Alexandru Odobescu (1834–1895, Wallachia/Romania, f/nf) • Laurel O'Donnell (living, US, f) • Mietta O'Donnell (1950–2001, Australia, nf) • Bernard O'Dowd (1866–1953, Australia, p/nf) • Dennis O'Driscoll (1954–2012, Ireland, p/nf) • Antoni Edward Odyniec (1804–1885, Poland, p) • Kenzaburō Ōe (大江健三郎, 1935–2023, Japan, f/nf) • Héctor Germán Oesterheld (1919–1977 or later, Argentina, f) • Maggie O'Farrell (born 1972, N Ireland/England, f) • Ernest O'Ferrall (1881–1925, Australia, p/f/nf) • Ron Offen (1930–2010, US, p/d/nf) • Yōko Ogawa (小川洋子, born 1962, Japan, f/nf) • Charles Ogden, (living, US, ch) joint pseudonym • Elisabeth Ogilvie (1917–2006, US, f/nf/ch) • Ian Ogilvy (born 1943, England, d/f) • William Henry Ogilvie (1869–1963, Scotland, p/f) • Ogiwara Seisensui (荻原井泉水, 1884–1976, Japan, p) • Finn Øglænd (born 1957, Norway, p/f/ch) • Kormákr Ögmundarson (fl. 10th c., Iceland, p) • Dejan Ognjanović (born 1973, Yugoslavia/Montenegro) • Vida Ognjenović (born 1941, Yugoslavia/Serbia, d/nf) • Margaret Ogola (1958–2011, Kenya, f) • Grace Ogot (1930–2015, Kenya, f) • Josephat Obi Oguejiofor (living, Nigeria, nf) • Olu Oguibe (born 1964, Nigeria/US, nf) • Ike Oguine (living, Nigeria, f) • Molara Ogundipe (1940–2019, Nigeria, p/nf) • Wole Oguntokun (born 1967, Nigeria, d/nf) • Mushitaro Oguri (小栗虫太郎, 1901–1946, Japan, f) • Frank O'Hara (1926–1966, US, p/d) • John O'Hara (1905–1970, US, f/d/nf) • John Bernard O'Hara (1862–1927, Australia, p) • Pixie O'Harris (1903–1991, Wales/Australia, nf/p/ch), pseudonym of Rhona Olive Harris • Bruno K. Öijer (born 1951, Sweden, p) • Tanure Ojaide (born 1948, Nigeria, p/f/nf) • Bayo Ojikutu (born 1971, Nigeria/US, f) • Okakura Kakuzō (岡倉覚三, 1863–1913, Japan, nf) • Atukwei Okai (1941–2018, Gold Coast/Ghana, p/nf) • Kanoko Okamoto (岡本かの子, 1889–1939, Japan, p/nf) • Kido Okamoto (岡本綺堂, 1872–1939, Japan, d) • Gabriel Okara (1921–2019, Nigeria, p/n) • Janette Oke (born 1935, Canada, f) • Chioma Okereke (living, Nigeria/England, p/f) • Christopher Okigbo (1932–1967, Nigeria, p) • Susan Moller Okin (born 1964, N Zealand, nf) • Einar Økland (born 1940, Norway, p/d/ch) • Julie Okoh (born 1947, Nigeria, d/f) • Nnedi Okorafor (born 1974, Nigeria/US, f/ch) • Okot p'Bitek (1931–1982, Uganda, p/nf) • Ifeoma Okoye (born c. 1937, Nigeria, f/ch) • Chinelo Okparanta (born 1981, Nigeria/US, f) • Isidore Okpewho (1941–2016, Nigeria/US, f/nf) • Ben Okri (born 1959, Nigeria/England, p/f) • Mary Karooro Okurut (born 1954, Uganda, f/nf)

Ol–Oo

• Afolabi Olabimtan (1932–2003, Nigeria, f/nf) • Olatubosun Oladapo (born 1943, Nigeria, p/d/nf) • Auður Ava Ólafsdóttir (born 1958, Iceland, f/d/p) • Eggert Ólafsson (1726–1768, Iceland, nf) • Jón Ólafsson (1850–1916, Iceland/Canada, nf) • Jón Ólafsson (c. 1594–1679, Iceland, nf) • Ólafur Jóhann Ólafsson (born 1962, Iceland, nf) • Páll Ólafsson (1927–2005, Iceland, p) • Nicolaus Olahus (1493–1568, Hungary, nf) • John Olday (1905–1977, US/Australia, f) • Jenny Oldfield (born 1949, England, ch) • John Oldmixon (1673–1742, England, nf/p/d) • Sharon Olds (born 1942, US, p) • Michael O'Leary (born 1950, N Zealand, p/f) • Sibylle von Olfers (1881–1916, Germany, ch) • Sergio Olguín (born 1967, Argentina, f/nf/ch) • Laurence Oliphant (1829–1988, S Africa/England, nf/f) • Margaret Oliphant (1828–1897, Scotland/England, f/nf) • Ukamaka Olisakwe (born 1982, Nigeria, f/d) • Oscar Núñez Oliva (born 1955, Costa Rica, f) • Gabriela Torres Olivares (born 1982, Mexico, f/nf) • Gloria Olive (1923–2006, US/N Zealand, nf) • Jamie Oliver (born 1975, England, nf) • Marina Oliver (born 1934, England, f/nf) • Mary Oliver (1935–2019, US, p) • Narelle Oliver (1960–2016, Australia, ch) • Alberto de Oliveira (1857–1937, Brazil, p) • Carlos de Oliveira (1921–1981, Portugal, p/f) • Juste Olivier (1807–1876, Switzerland, p/f/nf) • Narcís Oller (1846–1930, Spain, f) • Alfred Ollivant (1874–1927, England, f), Owd Bob • Ayodele Olofintuade (born 1970s, Nigeria, ch/f/nf) • Simbo Olorunfemi (living, Nigeria, p/nf) • Gregg Olsen (born 1959, US, nf/f) • Charles Olson (1910–1970, US, p) • Albert Olsson (1904–1994, Sweden, f) • Jan Olof Olsson (1920–1974, Sweden, nf) • Linda Olsson (born 1948, Sweden/N Zealand, f) • Grozdana Olujić (1934–2019, Yugoslavia/Serbia, f/ch) • Daniel O'Mahony (born 1973, England, f/d) • Rageh Omaar (born 1967, Somalia/England, nf) • Carola Oman (1897–1978, England, f/nf/ch) • Qais Akbar Omar (born 1982, Afghanistan/US, nf) • Shazia Omar (living, Bangladesh, f/nf) • Kristín Ómarsdóttir (born 1962, Iceland, f/p/d) • Rahraw Omarzad (born 1964, Afghanistan, nf) • Ömer Seyfettin (1884–1920, Ottoman E, f/p) • Tamsin Omond (born 1984, England, nf) • Kole Omotosho (born 1943, Nigeria, f/nf) • Arthur Omre (1887–1967, Norway, f) • Kola Onadipe (1922–1988, Nigeria, ch) • Iván Oñate (born 1948, Ecuador, p/f) • Michael Ondaatje (born 1943, Ceylon/Canada, p/f/nf) • Ondjaki (born 1977, Angola, p/ch/f), pseudonym of Ndalu de Almeida • Ľudo Ondrejov (1901–1962, Austria-Hungary/Czechoslovakia, p/f/nf) • Alexandre O'Neill (1924–1986, Portugal, p) • Eugene O'Neill (1888–1953, US, d/f) • Tony O'Neill (born 1978, England/US, f/p/nf) • Juan Carlos Onetti (1909–1994, Uruguay/Spain, f) • Beria Onger (1921–2015, Turkey, nf) • Oliver Onions (1873–1961, England, f) • Makena Onjerika (living, Kenya, f) • Tõnu Õnnepalu (born 1962, Estonia, f/nf/p) • Fuyumi Ono (小野不由美, born 1960, Japan, f) • Ono no Komachi (小野小町, c. 825 – c. 900, Japan, p) • Saishū Onoe (尾上柴舟, 1876–1957, Japan, p), pseudonym of Hachirō Onoe (尾上八郎) • Nuzo Onoh (born 1962, Nigeria, f/nf) • Onomacritus (c. 530–480 BCE, Greece, p) • Charles van Onselen (living, S Africa, nf) • Inte Onsman (1872–1929, Netherlands, d) • Chibundu Onuzo (born 1991, Nigeria, f) • Nduka Onwuegbute (born 1969, England/Nigeria, d/f/ch) • Osonye Tess Onwueme (born 1955, Nigeria, d/p/nf) • Troy Onyango (born 1993, Kenya, nf/f) • Charles Onyango-Obbo (born 1958, Uganda, nf) • Ifeoma Onyefulu (born 1959, Nigeria/England, ch/f) • Onyeka (living, England, nf) • Makoto Ōoka (大岡信, 1931–2017, Japan, p/nf) • Shōhei Ōoka (大岡昇平, 1909–1988, Japan, f/nf)

Op–Oz

• Joanna Oparek (born 1967, Poland, f/p) • Joseph Opatoshu (1886–1954, Poland/US, f) • Amelia Opie (1769–1853, England, f/p/nf) • Martin Opitz (1597–1639, Germany/Danzig, p) • Kenneth Oppel (born 1967, Canada, ch) • George Oppen (1908–1984, US, p) • E. Phillips Oppenheim (1866–1946, England/Guernsey, f) • Joachim Oppenheim (1832–1891, Austria/Czech, nf) • Andrés Oppenheimer (born 1951, Argentina, nf) • Robert Oppenheimer (1904–1967, US, nf) • Artur Oppman (1867–1931, Russian E/Poland, p) • Leonard Oprea (born 1953, Romania/US, f/p/nf) • Marek Oramus (born 1952, Poland, f/nf) • Claudia Orange (born 1938, N Zealand, nf) • Vladimir Oravsky (born 1947, Czechoslovakia/Sweden, d/ch) • Yolanda Oreamuno (1916–1956, Costa Rica, f/nf) • Alexander Orbeliani (1802–1869, Russian E, p/d/nf) • David Orbeliani (1739–1796, Georgia, p) • Grigol Orbeliani (1804–1883, Russian E, p) • Sulkhan-Saba Orbeliani (1658–1725, Georgia, nf) • Vakhtang Orbeliani (1812–1890, Russian E, p) • Margaret Orbell (1935–2006, N Zealand, nf) • Mavro Orbini (1563–1614, Ragusa, nf) • Baroness Orczy (1865–1947, Hungary/England, f/d) • Edward Otho Cresap Ord, II (1858–1923, US, p) • Orderic Vitalis (1075 – c. 1142, England, nf) • Jerry Ordway (born 1957, US, f/ch) • Bill O'Reilly (born 1949, US, nf) • Dowell O'Reilly (1865–1923, Australia, p/f) • Giorgio Orelli (1921–2013, Switzerland, p/nf) • Giovanni Orelli (1928–2016, Switzerland, p/f/nf) • Zaharije Orfelin (1726–1785, Habsburg E, nf/p) • Mathieu Orfila (1787–1853, Spain/France, nf) • Emilio Oribe (1893–1975, Uruguay, p/nf) • Origen (c. 184 – c. 253 CE, Egypt/Lebanon, nf) • Nadia Origo (born 1977, Gabon/France, f/nf) • Shinobu Orikuchi (折口信夫, 1887–1953, Japan, nf/f/p) • Bukola Oriola (born 1976, Nigeria/US, nf) • Tore Ørjasæter (1886–1968, Norway, nf/p) • Iza Orjonikidze (1938–2010, USSR/Georgia, p/nf) • Władysław Orkan (1875–1930, Austria-Hungary/Poland, f/nf/p) • István Örkény (1912–1979, Hungary, d/f) • Uri Orlev (1931–2022, Poland/Israel, ch) • Milan Orlić (born 1962, Yugoslavia/Serbia, p/nf) • Peter Orlovsky (1933–2010, US, p) • Kate Orman (born 1968, Australia, f) • Edward Ormondroyd (born 1925, US, ch) • Olga Orozco (1920–1999, Algeria, p) • Elvira Orphée (1922–2018, Argentina, f) • Gregory Orr (born 1947, US, p) • Mary Orr (1910–2006, US, f) • Sue Orr (born 1962, N Zealand, f) • Julie Orringer (born 1973, US, f) • Hanne Ørstavik (born 1969, Norway, f) • Garcia de Orta (c. 1501–1568, Portugal, nf) • José Ortega y Gasset (1883–1955, Spain, nf) • Abraham Ortelius (1527–1598, Netherlands, nf) • Ramalho Ortigão (1836–1916, Portugal, nf) • Adalberto Ortiz (1914–2003, Ecuador, f/p) • Alicia Dujovne Ortiz (born 1940, Argentina, nf) • Juan Laurentino Ortiz (1896–1978, Argentina, p) • Ernst Ortlepp (1800–1864, Germany, p) • Joe Orton (1933–1967, England, d/f/nf) • Julia Anna Orum (1843–1904, US, nf) • Ernst Orvil (1898–1985, Norway, f/p/d), pseudonym of Ernst Richard Nilsen • George Orwell (1903–1950, England/Scotland, f/nf), pseudonym of Eric Arthur Blair • Eliza Orzeszkowa (1841–1910, Russian E, f/nf) • Dennis Osadebay (1911–1994, Nigeria, p/nf) • Kaoru Osanai (小山内薫, 1881–1928, Japan, d) • Arthur Osborne (1906–1970, UK, nf) • Helen Osborne (1939–2004, England, nf) • John Osborne (1929–1994, England, d) • Mary Pope Osborne (born 1949, US, ch) • Paul Oscar (born 1970, Iceland, p), pseudonym of Páll Óskar Hjálmtýsson • Lee Oser (born 1958, US, f/nf) • Alice Oseman (born 1996, England, f/ch/d) • Tam O'Shaughnessy (born 1952, US, ch) • Pat O'Shea (1931–2007, Ireland/England, ch) • Shunrō Oshikawa (押川春浪, 1876–1914, Japan, f/nf) • Andreas Osiander (1498–1552, Germany, nf) • Agnieszka Osiecka (1936–1997, Poland, p/d) • Sara Margrethe Oskal (born 1970, Norway, p/f/d) • Jón Óskar (1921–1998, Iceland, p) • Sam Osman (living, England/US, f/ch) • Shawkat Osman (1917–1998, India/Bangladesh, f) • Mari Osmundsen (born 1951, Norway, f/ch), pseudonym of Anne Kristine Halling • Femi Osofisan (born 1946, Nigeria, d/nf) • E. C. Osondu (living, Nigeria, f/nf) • Ana de Castro Osório (1872–1935, Portugal, nf) • Ferdynand Antoni Ossendowski (1876–1945, Russian E/Poland, nf) • Carl von Ossietzky (1889–1938, Germany, nf) • Hanni Ossott (1946–2002, Venezuela, p/nf) • Klas Östergren (born 1955, Sweden, f/d) • Josip Osti (1945–2021, Yugoslavia/Slovenia, p/nf) • Ljubica Ostojić (1945–2021), Yugoslavia/Bosnia, p/nf/d) • John Ostrander (born 1949, US, ch) • Niyi Osundare (born 1947, Nigeria, p/d/nf) • Sissel Benneche Osvold (born 1945, Norway, nf) • Oswald von Wolkenstein (1336/1337–1445, Germany, p) • Alice Oswald (born 1966, England, p) • Mizuho Ōta (太田水穂, 1876–1955, Japan, p/nf), pseudonym of Teiichi Ōta (太田貞) • Manuel Ramos Otero (1948–1990, Puerto Rico, nf/p) • Otfrid of Weissenburg (c. 800–870, Germany, p) • Ōtomo no Yakamochi (大伴家持, c. 718–785, Japan, p) • U Ottama (1879–1939, Burma, nf) • Óttarr svarti (fl: 11th c., Iceland, p) • Géza Ottlik (1912–1990, Hungary, nf) • Moncef Ouahibi (born 1949, Tunisia, p/f/nf) • Tahar Ouettar (1936–2010, Algeria, f/nf), also known as Al-Tāhir Wattar • Malika Oufkir (born 1953, Morocco/France, nf) • Onyinye Ough (living, Nigeria, f/nf) • Julya Oui (living, Malaysia, p/f) • Ouida (1839–1908, England/Italy, f/ch/nf), pseudonym of Maria Louise Ramé • Touria Oulehri (born 1962, Morocco, nf) • Yambo Ouologuem (1940–2017, Mali, f/nf) • Ide Oumarou (1937–2002, Niger, nf) • Sarah Outen (born 1985, England, nf) • Ouyang Xiu (歐陽脩, 1007–1072, China, nf/p) • Ouyang Xun (歐陽詢, 557–641, China, f) • Ouyang Yu (歐陽昱, born 1945, China/Australia, p/f/nf) • Helen Ovbiagele (born 1944, Nigeria, f) • Keith Ovenden (born 1943, England, f/nf) • Caroline Overington (born 1970, Australia, f/nf) • Thomas Overbury (1581–1613, England, p/nf) • Arnulf Øverland (1889–1968, Norway, p) • Charles Overton (1805–1889, England, nf/p) • Ovid (43 BCE – 17/18 CE, Roman E, p), full name Publius Ovidius Naso • Owain Owain (1929–1993, Wales, f/p) • Robin Llwyd ab Owain (born 1959, Wales, p) • Daniel Owen (1836–1895, Wales, f) • David Owen (1795–1866, Wales, nf), pseudonym Brutus • David Owen (Dewi Wyn o Eifion) (1784–1841, Wales, p) • Gerallt Lloyd Owen (1944–2014, Wales, p) • Goronwy Owen (1723–1769, Wales/US, p) • Jan Owen (born 1940, Australia, p) • Robert Owen (1771–1858, Wales/England, nf) • Ruth Owen (1885–1954, US, nf/ch) • Wilfred Owen (1893–1918, England/France, p) • William David Owen (1874–1925, Wales, f) • Yvonne Adhiambo Owuor (born 1968, Kenya, f/nf) • Helen Oxenbury (born 1938, England, ch) • Elsie J. Oxenham (1880–1960, England, ch) • Johan Gabriel Oxenstierna (1750–1818, Sweden, p) • Gunnhild Øyehaug (born 1975, Norway, p/f/nf) • Oyèrónkẹ́ Oyěwùmí (born 1957, Nigeria, nf) • Helen Oyeyemi (born 1984, Nigeria/Czech R, f/d) • Lauren Oyler (living, US, f) • Ferdinand Oyono (1929–2010, Cameroon, f) • Leticia de Oyuela (1935–2008, Honduras, nf) • Amos Oz (1939–2018, Palestine/Israel, f/ch/nf) • Ozaki Hōsai (尾崎放哉, 1885–1926, Japan, p) • Ozaki Kihachi (尾崎喜八, 1892–1974, Japan, p) • Ozaki Kōyō (尾崎紅葉, 1868–1903, Japan, f/p) • Jacques Ozanam (1640–1718, France, nf) • Emine Sevgi Özdamar (born 1946, Turkey/Germany, f/nf) • Ismet Özel (born 1944, Turkey, p/nf) • Joshua Ozersky (1967–2015, US, nf) • Cynthia Ozick (born 1928, US, f/nf) • Hanna Ożogowska (1904–1995, Duchy of Warsaw/Poland, f/p) • Yasujirō Ozu (小津安二郎, 1903–1963, Japan, d)