Release Dates
| USA | 2 April 1968 | (Washington, D.C.) (premiere) |
| USA | 3 April 1968 | (New York City, New York) (premiere) |
| USA | 3 April 1968 | (limited) |
| USA | 4 April 1968 | (Los Angeles, California) (premiere) |
| Japan | 11 April 1968 | |
| South Africa | 11 April 1968 | (Johannesburg) (premiere) |
| Argentina | 18 April 1968 | |
| Australia | 1 May 1968 | (Sydney) (premiere) |
| Australia | 2 May 1968 | |
| UK | 10 May 1968 | (London) (premiere) |
| UK | 12 May 1968 | |
| Italy | July 1968 | (Trieste Sci-fi Film Festival) |
| Brazil | 4 July 1968 | |
| Ireland | 26 July 1968 | |
| Sweden | 27 August 1968 | |
| Belgium | 5 September 1968 | (Brussels) |
| West Germany | 11 September 1968 | |
| Finland | 20 September 1968 | |
| France | 27 September 1968 | |
| Portugal | 1 October 1968 | |
| Netherlands | 3 October 1968 | |
| Spain | 17 October 1968 | |
| Mexico | 31 October 1968 | |
| Greece | 11 December 1968 | |
| Italy | 11 December 1968 | (Rome) (premiere) |
| Italy | 12 December 1968 | |
| Norway | 28 February 1969 | |
| Hong Kong | 1 March 1969 | |
| Colombia | 29 May 1969 | |
| Uruguay | 16 July 1969 | |
| Denmark | 4 August 1969 | |
| Serbia | 11 January 1971 | (Belgrade Film Festival) |
| Iceland | 14 October 1972 | |
| Turkey | 19 November 1973 | |
| USA | 15 December 1973 | (Filmex Festival) |
| Poland | January 1974 | |
| USA | 1 January 1974 | (re-release) |
| Italy | 5 March 1974 | (re-release) |
| Spain | 26 August 1974 | (re-release) |
| France | 28 July 1976 | (re-release) |
| USA | 1 July 1977 | (re-release) |
| West Germany | 21 April 1978 | (re-release) |
| Finland | 5 May 1978 | (re-release) |
| Japan | 21 October 1978 | (re-release) |
| Hungary | 22 March 1979 | |
| Hong Kong | 19 January 1980 | (re-release) |
| USA | 8 February 1980 | (re-release) |
| France | 10 June 1981 | (re-release) |
| Australia | 10 September 1981 | (re-release) |
| Italy | 15 July 1982 | (re-release) |
| Australia | 23 August 1984 | (re-release) |
| France | 1 July 1985 | (re-release) |
| USA | January 1992 | (Sundance Film Festival) |
| Japan | 11 February 1995 | (re-release) |
| Spain | 29 December 1995 | (Filmoteca Española) (re-release) |
| Germany | 22 February 2001 | (limited) (re-release) |
| France | 7 March 2001 | (re-release) |
| Italy | 7 March 2001 | (re-release) |
| Australia | 8 March 2001 | (re-release) |
| UK | 30 March 2001 | (re-release) |
| Japan | 7 April 2001 | (re-release) |
| Switzerland | 23 May 2001 | (French speaking region) (re-release) |
| Greece | 23 August 2001 | (DVD premiere) |
| France | September 2001 | (Deauville Film Festival) |
| USA | 5 October 2001 | (re-release) (limited) |
| Argentina | 11 October 2001 | (re-release) |
| Iceland | 9 November 2001 | (re-release) (Reykjavik Film Festival) |
| USA | 5 July 2003 | (Moonlit Matines Film Festival) |
| Norway | 27 August 2004 | (70mm Film Festival) |
| Germany | February 2005 | (Berlin International Film Festival) |
| Finland | 17 June 2006 | (70mm version) (Midnight Sun Film Festival) |
| Hong Kong | 6 January 2007 | (limited) (re-release) |
| UK | 24 February 2008 | (London Stanley Kubrick 2008: A Film Odyssey) |
| USA | 27 April 2008 | (Tribeca Film Festival) |
| Japan | 28 June 2008 | (Tokyo) (re-release) |
| South Korea | September 2008 | (Chungmuro International Film Festival) |
| Spain | 3 October 2008 | (Sitges Film Festival) |
| Finland | 24 January 2009 | (DocPoint Film Festival) |
| Canada | 5 February 2010 | (Digital Film Festival) |
| Hong Kong | 11 March 2010 | (re-release) (limited) |
| USA | 23 April 2010 | (TCM Classic Film Festival) |
| USA | 14 April 2012 | (RiverRun International Film Festival) |
| USA | 21 December 2012 | (Film Society of Lincoln Center) (restored 70mm version) |
| Portugal | 21 November 2013 | (re-release) |
| Denmark | 26 April 2014 | (Aalborg) (70mm film event) |
| UK | 18 October 2014 | (Leeds International Film Festival) |
| Poland | 14 November 2014 | (re-release) |
| Ireland | 16 November 2014 | (Cork International Film Festival) |
| UK | 28 November 2014 | (re-release) (limited) |
| Ireland | 28 November 2014 | (re-release) |
| Spain | 25 December 2014 | (Barcelona) (re-release) |
| Hungary | 12 March 2015 | (re-release) |
| Spain | 16 April 2015 | (re-release) (limited) (subtitled version) |
| Spain | 10 June 2015 | (Barcelona) (re-release) (70mm) |
| Argentina | 20 May 2017 | (re-release) |
| Sweden | 12 September 2017 | (re-release) (limited) |
| France | 13 May 2018 | (Cannes Film Festival) |
| USA | 18 May 2018 | (re-release) |
| Netherlands | 31 May 2018 | (re-release) |
| Spain | 1 June 2018 | (re-release) (subtitled version) |
| Taiwan | 22 June 2018 | (re-release) |
| USA | 24 August 2018 | (IMAX version) |
| Russia | 30 August 2018 | |
| Singapore | 27 September 2018 | (IMAX re-release) |
Also Known As (AKA)
| Argentina | 2001: Odisea del espacio |
| Belgium (Flemish title) | 2001: Ruimte odyssee |
| Bulgaria (Bulgarian title) | 2001: Една одисея в космоса |
| Brazil | 2001: Uma Odisséia no Espaço |
| Canada (English title) | 2001: A Space Odyssey |
| Canada (French title) | 2001: L'odyssée de l'espace |
| Colombia | 2001: Odisea del espacio |
| Czechoslovakia (Czech title) | 2001: Cesta do Vesmíru |
| Czechoslovakia (Slovak title) | 2001: Cesta do Vesmíru |
| Czech Republic | 2001: Vesmírná odysea |
| Germany | 2001: Odyssee im Weltraum |
| Denmark | Rumrejsen år 2001 |
| Estonia | 2001: Kosmoseodüsseia |
| Spain | 2001: Una odisea del espacio |
| Spain (Catalan title) | 2001: Una odissea de l'espai |
| Finland | 2001: Avaruusseikkailu |
| Finland (Swedish title) | 2001: Ett rymdäventyr |
| Finland (TV title) | Avaruusseikkailu 2001 |
| France | 2001, l'odyssée de l'espace |
| Greece (transliterated ISO-LATIN-1 title) | 2001 - I odysseia tou diastimatos |
| Greece | 2001: Οδύσσεια του διαστήματος |
| Croatia | 2001: Odiseja u svemiru |
| Hungary | 2001: Űrodüsszeia |
| Iceland | Ódysseifsferð árið 2001 |
| Italy | 2001: Odissea nello spazio |
| Japan | 2001 nen: Uchuu no Tabi |
| Lithuania | 2001: Kosmine odiseja |
| Mexico | 2001: Odisea del espacio |
| Netherlands (informal literal title) | 2001: Een zwerftocht in de ruimte |
| Norway | 2001: En romodyssé |
| Peru | 2001: Odisea del espacio |
| Poland | 2001: Odyseja kosmiczna |
| Portugal | 2001: Odisseia no Espaço |
| Romania | Odiseea spatiala 2001 |
| Serbia | 2001: Odiseja u svemiru |
| Russia | 2001 год: Космическая одиссея |
| Sweden | År 2001 - Ett rymdäventyr |
| Slovakia | 2001: Vesmírna odysea |
| Soviet Union (Russian title) | 2001 год: Космическая одиссея |
| Turkey (Turkish title) | 2001: Uzay Yolu Macerasi |
| Ukraine | 2001: Космiчна Одiссея |
| USA (working title) | How the Solar System Was Won |
| USA (working title) | Journey Beyond the Stars |
| USA (alternative spelling) | Two Thousand and One: A Space Odyssey |
| Uruguay (original subtitled version) | 2001: Odisea del espacio |
| West Germany | 2001: Odyssee im Weltraum |
