Alice Comyn, Countess of Buchan, Lady Beaumont (1289 – 3 July 1349) was a Scottish noblewoman, a member of the powerful Comyn family which supported the Balliols, claimants to the disputed Scottish throne against their rivals, the Bruces. She was the niece of John Comyn, Earl of Buchan, to whom she was also heiress, and after his death the Earldom of Buchan was successfully claimed by her husband Henry de Beaumont, Earl of Buchan, by right of his wife. His long struggle to claim her Earldom of Buchan was one of the causes of the Second War of Scottish Independence.