Archibald Kennedy, 2nd Marquess of Ailsa, KT (25 August 1816 – 20 March 1870) was a Scottish peer and soldier.

Born at Dunottar, he was the eldest son of Archibald Kennedy, Earl of Cassilis, himself the oldest son of Archibald Kennedy, 1st Marquess of Ailsa, and his wife Eleanor, daughter of Alexander Allardyce.

Eleanor as Marchioness was involved with Catharine Tait's Ladies Diocesan Association visiting the poor in the City Road Workhouse.

[1] On 10 November 1846, Ailsa married Julia Jephson, daughter of Sir Richard Jephson, 1st Baronet, and had by her three sons and three daughters:[1] On 4 March 1870, Ailsa suffered fatal head injuries after being thrown from his horse while fox hunting near Craigie, Ayrshire.

Hi wife and daughter Lady Evelyn accompanied him back to the family residence, Culzean Castle, where his condition worsened.