Baron Acton, of Aldenham in the County of Shropshire, is a title in the Peerage of the United Kingdom.

[2] It was created on 11 December 1869 for Sir John Dalberg-Acton, 8th Baronet, a prominent historian and Liberal Member of Parliament.

[3] His son, the second Baron, was a diplomat and also held minor office in the Liberal administrations of Sir Henry Campbell-Bannerman and H. H. Asquith.

However, on 17 April 2000, he was created a life peer as Baron Acton of Bridgnorth, of Aldenham in the County of Shropshire.

The sixth Baronet served as Prime Minister of the Kingdom of Naples and married his niece, Mary Anne Acton.

The heraldic blazon for the coat of arms of the Lyon-Dalberg-Acton family is: Quarterly: 1st and 4th: Gules, semée of cross crosslets fitchée or two lions passant guardant in pale argent (for Acton); 2nd, quarterly: 1st and 4th: Azure, six fleurs-de-lis three two and one argent a chief dancetty of the last; 2nd and 3rd: Or, a cross patonce gules over all an escutcheon gules thereon a tower argent a chief dancetty of the last (for Dalberg); 3rd: Azure, a lion passant or between three plates each charged with a griffin's head erased sable (for Lyon).

[7] The heir presumptive is the present holder's son, Francesco Taccone, nobile dei marchesi of Stizzano[9] (b.

Alfredo Acton was awarded the title of baron in the Kingdom of Italy by motu proprio of Victor Emmanuel III in February 1925.