HM Prison Acklington was a Category C men's prison, located near the village of Acklington a few miles from Amble), in Northumberland, England. Acklington Prison was operated by Her Majesty's Prison Service. In 2011 Acklington was merged into the newly named HM Prison Northumberland. HMP Acklington was the most northerly adult prison in England, and was built on the site of the former RAF Acklington airfield.