The historical concept and definition of sexual orientation varies and has changed greatly over time; for example the word "gay" wasn't used to describe sexual orientation until the mid 20th century. A number of different classification schemes have been used to describe sexual orientation since the mid-19th century, and scholars have often defined the term "sexual orientation" in divergent ways. Indeed, several studies have found that much of the research about sexual orientation has failed to define the term at all, making it difficult to reconcile the results of different studies. However, most definitions include a psychological component (such as the direction of an individual's erotic desire) and/or a behavioural component (which focuses on the sex of the individual's sexual partner/s). Some prefer to simply follow an individual's self-definition or identity. See homosexuality and bisexuality for criteria that have traditionally denoted lesbian, gay and bisexual (LGB) people.
The high prevalence of people from the West on this list may be due to societal attitudes towards homosexuality. The Pew Research Center's 2003 Global Attitudes Survey found that "[p]eople in Africa and the Middle East strongly object to societal acceptance of homosexuality. But there is far greater tolerance for homosexuality in major Latin American countries such as Mexico, Argentina, Bolivia and Brazil. Opinion in Europe is split between West and East. Majorities in every Western European nation surveyed say homosexuality should be accepted by society, while most Russians, Poles and Ukrainians disagree. Americans are divided – a thin majority (51 percent) believes homosexuality should be accepted, while 42 percent disagree."
| Name | Dates | Nationality | Profession | Notes |
|---|---|---|---|---|
| Adam Nagourney | b. 1954 | American | Journalist | G |
| Kathy Najimy | b. 1957 | American | Actor | B |
| Bif Naked | b. 1971 | Canadian | Musician, actor | B |
| Billy Name | b. 1940 | American | Photographer | G |
| Michael Nava | b. 1954 | American | Writer | G |
| Yves Navarre | 1940-1994 | French | Writer | G |
| Martina Navratilova | b. 1956 | Czech | Tennis player | L |
| Alla Nazimova | 1879-1945 | Ukranian | Actor | B |
| Me'shell Ndegeocello | b. 1968 | American | Musician | L |
| Jim Neal | b. 1953 | American | Investor, political figure | G |
| Ted Nebbeling | b. ? | Canadian | Politician | G |
| Mike Nelson | b. ? | American | Politician | G |
| Ondrej Nepela | 1951-1989 | Slovak | Figure skater | G |
| Adi Nes | b. 1966 | Israeli | Photographer | G |
| Joan Nestle | b. 1940 | American | Activist, writer | L |
| Robert Newton | b. 1981 | English | Athlete | G |
| Sheila Nicholls | b. 1970 | English | Musician | L |
| Beverley Nichols | 1898-1983 | English | Playwright, actor, novelist, composer | G |
| Jack Nichols | 1938-2005 | American | Writer, LGBT rights activist | G |
| Bruce William Nickerson | b. 1941 | American | Lawyer | G |
| Alwin Nikolais | 1910-1993 | American | Dancer, choreographer, composer | G |
| Dennis Nilsen | b. 1945 | English | Serial killer | G |
| Anaïs Nin | 1903-1977 | American | Diarist | B |
| Willi Ninja | 1961–2006 | American | Dancer, choreographer | G |
| Cynthia Nixon | b. 1966 | American | Actor | B |
| Wacław Niżyński | 1889–1950 | Polish | Dancer | G |
| Simon Nkoli | 1957–1998 | South African | AIDS and LGBT rights activist. | G |
| Elaine Noble | b. 1944 | American | Politician, activist | L |
| Anna Nolan | 1970 | Irish | Television presenter | L |
| Klaus Nomi | 1944-1983 | German | Musician | G |
| Siiri Nordin | b. 1980 | Finnish | Musician | L |
| John Normington | 1937-2007 | English | Actor | G |
| Colin Norris | b. ? | English | Serial killer | G |
| David Norris | b. 1944 | Irish | Civil rights campaigner | G |
| Kevin and Don Norte | b. 1962 | American | Politicians | G |
| Graham Norton | b. 1963 | Irish | Talk show host, comedian, actor | G |
| Ramón Novarro | 1899-1968 | Mexican | Actor | G |
| Ivor Novello | 1893-1951 | Welsh | Actor, composer, musician | G |
| Salvador Novo | 1904-1974 | Mexican | Poet, playwright | G |
| Richard Bruce Nugent | 1906-1987 | American | Author | G |
| Rudolf Nureyev | 1938-1993 | Russian | Dancer | G |
| Katja Nyberg | b. 1979 | Norwegian | Handball player | L |
| Ron Nyswaner | b. 1956 | American | Screenwriter, film director | G |
| Name | Dates | Nationality | Profession | Notes |
|---|---|---|---|---|
| Rachid O. | b. 1970 | Moroccan | Writer | G |
| Cathal Ó Searcaigh | b. ? | Irish | Poet | G |
| Ed Oakley | b. ? | American | Politician | G |
| Achy Obejas | b. 1956 | Cuban | Writer | G |
| Charles J. O'Byrne | b. 1964 | American | Politician, ex-Priest | G |
| Robyn Ochs | b. 1958 | American | Activist, writer | B |
| Sinéad O'Connor | b. 1966 | Irish | Musician | B |
| Robert Odeman | 1904–1985 | German | Pianist, composer | G |
| Daniel O'Donnell | b. ? | American | Politician | G |
| Rosie O'Donnell | b. 1962 | American | Comedian, talk show host, actor | L |
| Colm O'Gorman | b. 1966 | Irish | Executive Director of Amnesty International in Ireland | G |
| Paul O'Grady | b. 1955 | English | Comedian, TV host | G |
| Frank O'Hara | 1926–1966 | American | Poet | G |
| Denis O'Hare | b. 1962 | American | Actor | G |
| Elisabeth Ohlson | b. 1961 | Swedish | Photographer | L |
| Jean O'Leary | 1948—2005 | American | Lesbian rights activist | L |
| Maurice Oldfield | 1915—1981 | English | Intelligence officer | G |
| Andrew Olexander | b. 1965 | Australian | Politician | G |
| David Oliver | 1962–1991 | American | Actor | G |
| Mary Oliver | b. 1935 | American | Poet | L |
| Pauline Oliveros | b. 1932 | American | Accordionist, composer | L |
| Sir Laurence Olivier | 1907-1989 | British | Actor | B |
| Dana Olmert | b. ? | Israeli | Professor | L |
| Olivia O'Lovely | b. 1976 | American | Porn star | B |
| Stefan Olsdal | b. 1974 | Swedish | Musician (Placebo) | G |
| Ryan O'Meara | b. 1984 | American | Ice dancer and figure skating coach | G |
| Ondine | 1937-1989 | American | Actor | G |
| Jamie O'Neill | b. 1962 | Irish | Writer | G |
| Han Ong | b. 1968 | Filipino-American | Novelist, playwright | G |
| Suze Orman | b. 1951 | American | Personal finance guru, talk show host, author | L |
| Brian Orser | b. 1961 | Canadian | Olympic figure skater | G |
| Joe Orton | 1933-1967 | British | Playwright | G |
| Kanako Otsuji | b. 1974 | Japanese | Japan's first openly lesbian politician | L |
| Sean Ethan Owen | 1981-2004 | American | Murder victim | G |
| Nigel Owens | b. 1971 | Welsh | International rugby union referee | G |
| François Ozon | b. 1967 | French | Film director, screenwriter | G |
| Ferzan Özpetek | b. 1959 | Turkish | Filmmaker | G |