博斯沃思原野战役（英语：Battle of Bosworth Field）是15世纪后半叶兰开斯特王朝与约克王朝间的内战，也是玫瑰战争中倒数第二场战役，战火蔓延至全英格兰。自1485年8月22日开战，终由兰开斯特王朝获胜。在凯旋并娶了约克王朝公主伊丽莎白后，兰开斯特王朝的领袖里士满伯爵亨利·都铎登基成为都铎王朝的首任英王。他的敌手、约克王朝的最后一任国王理查三世，则死于此战役。历史学家认为博斯沃思原野战役象征着金雀花王朝的终结，为英国历史关键性的一刻。

The Battle of Bosworth (or Bosworth Field) was the last significant battle of the Wars of the Roses, the civil war between the Houses of Lancaster and York that raged across England in the latter half of the 15th century. Fought on 22 August 1485, the battle was won by the Lancastrians. Their leader Henry Tudor, Earl of Richmond, by his victory became the first English monarch of the Tudor dynasty. His opponent, Richard III, the last king of the House of York, was killed in the battle. Historians consider Bosworth Field to mark the end of the Plantagenet dynasty, making it a defining moment of English and Welsh history.