Alchmund of Derby was a Northumbrian prince and warrior who lived during the late eighth and early ninth centuries. As the son of King Alhred, he was involved in the dynastic conflicts of Northumbria and spent over two decades living in exile among the Picts. Upon returning with an army, he ascended to the throne, where he was known for his generosity toward orphans and the impoverished. His reign ended abruptly around 800 when he was killed, an event attributed to King Eardwulf.