| Carel van Nievelt | 1843–1913 | 1 |
| Florence Nightingale | 1820–1910 | 2 |
| Henry Thayer Niles | 1825–1901 | 1 |
| John Nisbet | 1853–1914 | 1 |
| Alli Nissinen | 1866–1926 | 3 |
| Inazo Nitobe | 1862–1933 | 1 |
| Francesco Saverio Nitti | 1868–1953 | 1 |
| Paul Nixon | 1882–1956 | 1 |
| Richard M. (Richard Milhous) Nixon | 1913–1994 | 1 |
| Joseph Noad | 1823–1898 | 1 |
| Anna de Noailles | 1876–1933 | 1 |
| Alden Charles Noble | 1880–1942 | 1 |
| Alfred Noble | 1844–1914 | 1 |
| António Pereira Nobre | 1867–1900 | 1 |
| Norman Nodel | 1922–2000 | 1 |
| Charles Nodier | 1780–1844 | 3 |
| Ludwig Nohl | 1831–1885 | 3 |
| Norah | 1826–1898 | 2 |
| Max Simon Nordau | 1849–1923 | 3 |
| Carl E. (Carl Edin) Nordberg | 1880–1926 | 1 |
| Conrad Hjalmar Nordby | 1867–1900 | 1 |
| A. E. (Adolf Erik) Nordenskiöld | 1832–1901 | 1 |
| Charles Nordhoff | 1830–1901 | 2 |
| Karl Nordlund | born 1871 | 1 |
| Frank Norris | 1870–1902 | 9 |
| Kathleen Thompson Norris | 1880–1966 | 11 |
| W. E. (William Edward) Norris | 1847–1925 | 1 |
| Naomi Norsworthy | 1877–1916 | 1 |
| Rosalind Northcote | 1873–1950 | 1 |
| George Tyler Northup | 1874–1964 | 1 |
| Andre Norton | 1912–2005 | 12 |
| Arthur O. Norton | 1869–1959 | 1 |
| Charles Eliot Norton | 1827–1908 | 5 |
| Minerva Brace Norton | born 1837 | 1 |
| William Harmon Norton | 1856–1944 | 1 |
| Vladimir Nosek | 1895–1964 | 1 |
| Florence England Nosworthy | 1872–1936 | 5 |
| Charles C. Nott | 1827–1916 | 1 |
| Mariano Nougués Secall | 1808–1872 | 1 |
| Alan Edward Nourse | 1928–1992 | 14 |
| Maximillian E. Novak | born 1930 | 1 |
| Novalis | 1772–1801 | — |
| Angiolo Silvio Novaro | 1866–1938 | 1 |
| Irving H. Novick | 1916–2004 | 3 |
| Jan Václav Novák | 1853–1920 | 1 |
| Philip Francis Nowlan | 1888–1940 | 1 |
| William Nowlin | 1821–1884 | 1 |
| Alfred Noyes | 1880–1958 | 3 |
| George Rapall Noyes | 1873–1952 | 1 |
| William Noyes | 1862–1928 | 1 |
| Homer Heath Nugent | born 1893 | 1 |
| Cláudio José Nunes | 1831–1875 | 1 |
| Severi Nuormaa | 1865–1924 | 1 |
| Walter R. Nursey | 1847–1927 | 1 |
| Josef Pierre Nuyttens | 1885–1960 | 1 |
| Branislav Nušić | 1864–1938 | 1 |
| Bill Nye | 1850–1896 | 3 |
| Edward J. (Edward Joseph) O'Brien | 1890–1941 | 8 |
| F. P. O'Brien | born 1885 | 1 |
| Fitz James O'Brien | 1828–1862 | 1 |
| Frederick O'Brien | 1869–1932 | 2 |
| George O'Brien | 1892–1973 | 1 |
| R. Barry (Richard Barry) O'Brien | 1847–1918 | — |
| Seumas O'Brien | born 1880 | 1 |
| Michael O'Clery | 1575–1643 | 1 |
| J. C. (John Charles) O'Connor | 1853–1928 | 1 |
| T. P. (Thomas Power) O'Connor | 1848–1929 | 1 |
| J. F. X. (John Francis Xavier) O'Conor | 1852–1920 | 1 |
| Elliott O'Donnell | 1872–1965 | 3 |
| Standish O'Grady | 1846–1928 | 2 |
| Anne O'Hagan | 1869–1934 | — |
| Harvey Jerrold O'Higgins | 1876–1929 | 1 |
| John O'Mahony | 1816–1877 | 1 |
| James O'Meara | 1825–1903 | 1 |
| Elizabeth (Elizabeth Speakman) O'Neill | born 1877 | 1 |
| Eugene O'Neill | 1888–1953 | 4 |
| Rose Cecil O'Neill | 1874–1944 | 2 |
| John Boyle O'Reilly | 1844–1890 | 1 |
| M. V. (Michael Vincent) O'Shea | 1866–1932 | 1 |
| Vincent O'Sullivan | 1868–1940 | 1 |