Francis Aislabie or Aslaby or Aslackby (by 1515 – 1557), of South Dalton, Yorkshire, was an English soldier and politician.
He was the first son of James Aislabie by Jane, daughter of Sir John Gower of Stittenham.
He served under Ellerker as lieutenant of the light horse at Boulogne where, during December 1545, "where his bravery in the field earned him a commendation from the Earl of Surrey to the King.
In June 1548 he attacked Dalkeith and burned villages in the Musselburgh area, and he fought off a French landing party at North Berwick.
He was one of the commanders of a raiding party that approached Tantallon Castle and came under artillery fire.