Lady Astor commonly refers to Nancy Astor, Viscountess Astor (1879–1964).
Lady Astor may also refer to:
Viscountess Astor
edit- Sarah Baring (1920–2013), 1st wife of the 3rd Viscount Astor
- Phillipa Victoria Hunloke, 2nd wife of William Astor, 3rd Viscount Astor
- Bronwen Astor (1930–2017), 3rd wife of the 3rd Viscount
- Annabel Astor, Viscountess Astor (born 1948), wife of William Astor, 4th Viscount Astor
Baroness Astor of Hever
edit- Violet Astor (1889–1965), wife of John Jacob Astor, 1st Baron Astor of Hever
- Irene Astor, Baroness Astor of Hever (1919–2001), wife of Gavin Astor, 2nd Baron Astor of Hever
- Fiona Diana Lennox-Harvey, 1st wife of John Astor, 3rd Baron Astor of Hever
- Liz Astor, Baroness Astor of Hever (born 1950), 2nd wife of 3rd Baron