Viscounts Astor (1917)
- William Waldorf Astor, 1st Viscount Astor (1848–1919)
- Waldorf Astor, 2nd Viscount Astor (1879–1952)
- William Waldorf Astor, 3rd Viscount Astor (1907–1966)
- William Waldorf Astor, 4th Viscount Astor (b. 1951)
The heir apparent is the present holder's eldest son, the Hon. William Waldorf Astor (b. 1979).
His heir apparent is his son, William Waldorf Astor (b. 2012).
Read more about this topic: Viscount Astor