| Honorific Prefix: | The Right Honourable |
| The Lord Milner of Leeds | |
| Office1: | Member of the House of Lords |
| Status1: | Lord Temporal |
| Term Label1: | as a hereditary peer |
| Term Start1: | 20 October 1967 |
| Term End1: | 11 November 1999 |
| Predecessor1: | The 1st Baron Milner of Leeds |
| Successor1: | Seat abolished |
| Term Label2: | as an elected hereditary peer |
| Term Start2: | 11 November 1999 |
| Term End2: | 20 August 2003 |
| 1Blankname2: | Election |
| 1Namedata2: | 1999 |
| Predecessor2: | Seat established |
| Successor2: | The 3rd Baron Grantchester |
| Birth Name: | Arthur James Michael Milner |
| Birth Date: | 12 September 1923 |
| Birth Place: | Leeds |
Arthur James Michael Milner, 2nd Baron Milner of Leeds (12 September 1923 – 20 August 2003), was a British solicitor and Labour Party politician.
Milner was the only son of James Milner, 1st Baron Milner of Leeds, and was born in Leeds in 1923. He was educated in Oundle School and Trinity Hall, Cambridge, with an interruption of four years, when Milner served in the Royal Air Force as a Flight Lieutenant. He graduated with a Master of Arts in 1948, working then as solicitor in his family firm. In July 1967, he inherited his father's title.
Milner was Assistant Labour Whip from 1971 to 1974, and retired when Harold Wilson became prime minister again. After the House of Lords Act 1999, he was one of the 92 hereditary peers elected to remain in the House of Lords, a reference to his continual support for Labour and to his father. He was further a Member of the Worshipful Company of Clothworkers and Honorary Treasurer of the Society of Yorkshiremen in London between 1967 and 1970.
Milner married twice. Firstly, he married Sheila Margaret Hartley on 31 March 1951. They had three children:[1]
After his wife's death in 2000, Milner married secondly Helen Cutting Wilmerding in 2002. Milner died in 2003 at the age of 79 and was succeeded in the barony by his only son Richard.
| Escutcheon: | Gules on a chevron Ermine between in chief two bits Or and in base a rose Argent barbed and seeded Proper a teazel Sable. |
| Crest: | Perched on a sword with point to the dexter Proper and hilt and pommel Or an owl also Proper gorged with a collar Sable thereon three mullets Argent pendent therefrom a pair of scales and resting on the dexter claw a portcullis chained Or. |
| Supporters: | On either side an owl Proper gorged with a collar Sable thereon three mullets Argent pendent therefrom a portcullis chained Or. |
| Motto: | Do Right And Fear Nothing[2] |