Ealhere (also referred to as Ealhhere or Alhere) (d. 853) was a Kentish thegn. In 851, he and Æthelstan, the under-king of Kent defeated an army of pagans in Sandwich. Nine ships were captured from the pagan fleet while the remainder fled.[1] Ealhere, titled "Ealhere princeps", was subsequently rewarded with grants of lands in Rochester and Lenham where chapels to St. Edmund were later built.[2]
From 851 to 853, the Isle of Thanet, the most easterly point of Kent, had been targeted by pagans for its small but fruitful cornfields.[3] As such, in 853, Ealhere and the men of Kent alongside Huda and the men of Surrey engaged in a naval battle with the pagans on Thanet, where both earls were slain.[1]