拜伦（西班牙语：Bailén）是西班牙哈恩省的一座城镇。地理位置：北纬38度06分，西经3度46分。

早在第二次布匿战争中，罗马统帅大西庇阿与迦太基统帅哈斯德鲁巴尔·巴卡曾在此地发生一场会战（当时此地名为巴埃库拉）。729年这里建起了一座修道院，逐渐形成市镇。1808年在半岛战争中，这里成为西班牙人抗击拿破仑入侵的战场。弗朗西斯科·哈维尔·卡斯塔尼奥斯将军在著名的拜伦战役中打败了皮埃尔-安托万·杜邦·德莱唐将军率领的法国军队。

Bailén (formerly Baylen in English) is a town in the province of Jaén, Spain.

Bailén is probably the ancient Baecula, where the Romans, under Scipio the elder, signally defeated the Carthaginians in 209 and 206 B.C. In its neighbourhood, also, in 1212, was fought the great Battle of Las Navas de Tolosa, in which, according to the ancient chroniclers, the Castilians under Alphonso VIII, slew 200,000 Almohads, and themselves only lost 25 men. Although this estimate is absurd, the victory of the Christians was complete.