Aelnoth of Northampton (died 1066) was an Anglo-Saxon captain who served under Ealdorman Aethelred of Huntingdonshire during the Norman conquest of England. Following the Battle of Maldon, Aelnoth took command of the remnants of Aethelred's army, only to be pursued by Robert Curthose's Norman army and killed in a clash at Tollesbury, Essex.