USA
The terrible and trecherous Pendragon plans to gain the throne of Cornwall by getting the king to abdicate and to marry his lovely daughter. To help him he has his dreadful witches in his castle and his almost unstoppable sorcery. A giant under his control abducts the princess, but on the way home with her the giant meets farming lad Jack who slays him. This is only the beginning. Be assured Pendragon and his evil magic are far from done. - IMDb
| L'ammazzagiganti |  Italy |
| Der Herrscher von Cornwall |  West Germany |
| Jack - O Matador de Gigantes (reissue title) |  Brazil |
| Jack el matador de gigantes |  Mexico |
| Jack ja hiiglane |  Estonia |
| Jack le tueur de géants |  Canada |
| Jack le tueur de géants |  France |
| Jack the Giant Killer |  Australia |
| Jack the Giant Killer | Canada |
| Jack the Giant Killer |  United Kingdom |
| Jack the Giant Killer |  Ireland |
| Jack the Giant Killer |  India |
| Jack the Giant Killer |  New Zealand |
| Jack the Giant Killer | USA |
| Jack the Giant Killer |  South Africa |
| Jack the Giant Killer - Das Original | West Germany |
| Jack ucigaşul de uriaşi |  Romania |
| Jack y el gigante asesino |  Spain |
| Jack y el gigante asesino | Spain |
| Jack zabíjí obra |  Czechoslovakia |
| Jack, az óriásölő |  Hungary |
| Jack, el Matagigantes | Spain |
| Jack, jättiläisten surmaaja |  Finland |
| Jack, kjempedreperen |  Norway |
| Jack: Jättedödaren |  Sweden |
| O anikitos ippotis (transliterated title) |  Greece |
| O Matador de Gigantes | Brazil |
| Sinbad devlere karşı |  Turkey |
| Uhyrets besejrer |  Denmark |
| Um Gigante Chamado Jack |  Portugal |
| Джек убийца великанов |  Soviet Union |
| ジャックと悪魔の国 |  Japan |
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Roger Mobley [13] | Peter |
