Ava Alice Muriel Astor was an American heiress, socialite, and member of the Astor family. She was the daughter of John Jacob Astor IV and Ava Lowle Willing, and sister of Vincent Astor and half-sister of John Jacob Astor VI.

The Astor family achieved prominence in business, society, and politics in the United States and the United Kingdom during the 19th and 20th centuries. With German roots, some of their ancestry goes back to the Italian and Swiss Alps, the Astors settled in Germany, first appearing in North America in the 18th century with John Jacob Astor, one of the wealthiest people in history.