Release Dates
| USA | 9 December 2006 | (Austin Butt-Numb-A-Thon) |
| Germany | 14 February 2007 | (Berlin International Film Festival) |
| Philippines | 7 March 2007 | |
| Greece | 8 March 2007 | |
| Malaysia | 8 March 2007 | |
| Singapore | 8 March 2007 | |
| Canada | 9 March 2007 | |
| Taiwan | 9 March 2007 | |
| USA | 9 March 2007 | |
| South Korea | 14 March 2007 | |
| Hong Kong | 15 March 2007 | |
| Indonesia | 16 March 2007 | |
| India | 16 March 2007 | |
| Iceland | 16 March 2007 | |
| Turkey | 16 March 2007 | |
| Belgium | 21 March 2007 | |
| Bahrain | 21 March 2007 | |
| France | 21 March 2007 | |
| Kuwait | 21 March 2007 | |
| Czech Republic | 22 March 2007 | |
| Hungary | 22 March 2007 | |
| Netherlands | 22 March 2007 | |
| Russia | 22 March 2007 | |
| Bulgaria | 23 March 2007 | |
| Estonia | 23 March 2007 | |
| Spain | 23 March 2007 | |
| UK | 23 March 2007 | |
| Ireland | 23 March 2007 | |
| Italy | 23 March 2007 | |
| Mexico | 23 March 2007 | |
| Norway | 23 March 2007 | |
| Poland | 23 March 2007 | |
| Romania | 23 March 2007 | |
| Venezuela | 23 March 2007 | |
| Argentina | 27 March 2007 | (Buenos Aires) (premiere) |
| Egypt | 28 March 2007 | |
| Latvia | 28 March 2007 | |
| Argentina | 29 March 2007 | |
| Chile | 29 March 2007 | |
| Colombia | 29 March 2007 | |
| Peru | 29 March 2007 | |
| Slovenia | 29 March 2007 | |
| Slovakia | 29 March 2007 | |
| Brazil | 30 March 2007 | |
| Denmark | 30 March 2007 | |
| Croatia | 30 March 2007 | |
| Lithuania | 30 March 2007 | |
| Panama | 30 March 2007 | |
| Uruguay | 30 March 2007 | |
| South Africa | 30 March 2007 | |
| Finland | 31 March 2007 | (Night Visions Film Festival) |
| Finland | 3 April 2007 | (limited) |
| Israel | 4 April 2007 | |
| Sweden | 4 April 2007 | |
| Australia | 5 April 2007 | |
| Germany | 5 April 2007 | |
| New Zealand | 5 April 2007 | |
| Portugal | 5 April 2007 | |
| Austria | 6 April 2007 | |
| Finland | 6 April 2007 | |
| Japan | 21 May 2007 | (Tokyo) |
| Japan | 9 June 2007 | |
| China | 14 June 2007 | (DVD premiere) |
Also Known As (AKA)
| Argentina | 300 |
| Bulgaria (Bulgarian title) | 300 |
| Brazil | 300 |
| Canada (French title) | 300 |
| Colombia | 300 |
| Czech Republic | 300: Bitva u Thermopyl |
| Germany | 300 |
| France | 300 |
| Greece | 300 |
| Croatia | 300 - Bitka kod Termopila |
| India (Tamil title) (dubbed version) | 300 Paruthi Veerargal |
| Mexico | 300 |
| Panama | 300 |
| Peru | 300 |
| Portugal | 300 |
| Romania | 300, Eroii de la Termopile |
| Serbia | 300 - Bitka kod Termopila |
| Russia | 300 Спартанцев |
| Turkey (Turkish title) | 300 Spartali |
| USA (informal title) | 300 |
| USA (IMAX version) | 300: The IMAX Experience |
| Uruguay (original subtitled version) | 300 |
| Venezuela | 300 |