Baron Beaverbrook, of Beaverbrook in the Province of New Brunswick in the Dominion of Canada and of Cherkley in the County of Surrey, is a title in the Peerage of the United Kingdom. It was created in 1917 for the prominent media owner and politician Sir Max Aitken, 1st Baronet. He had already been created a baronet, of Cherkley in the County of Surrey, on 3 July 1916. When Aitken died, his son disclaimed the barony three days later, stating that "there shall only be one Lord Beaverbrook in my lifetime". Since 1985, the title has been held by the latter's son, the third Baron.

The first Baron Beaverbrook's daughter, Janet Gladys Aitken, was the mother of John Edward Aitken Kidd. He is the father of Jemma Wellesley, Marchioness of Douro, and Jodie Kidd. Another member of the Aitken family is the Conservative politician Jonathan Aitken, who is the great-nephew of the first Baron Beaverbrook.

The family seat is Denchworth Manor, near Wantage in Oxfordshire. Replicas of the first Baron's two favourite cats can be viewed in the public research room of the Provincial Archives of New Brunswick.

• William Maxwell "Max" Aitken, 1st Baron Beaverbrook (1879–1964)
• John William Maxwell "Max" Aitken, 2nd Baron Beaverbrook (1910–1985) (disclaimed 1964)
• Maxwell William Humphrey Aitken, 3rd Baron Beaverbrook (b. 1951)

The heir apparent is the present holder's son, Maxwell Francis Aitken (b. 1977). The heir apparent's heir apparent is his son, Maxwell Alfonso Aitken (b. 2014).