Waldorf Astor, 2nd Viscount Astor, DL was an American-born English politician and newspaper proprietor. He was a member of the Astor family. He was active in minor political roles. He was devoted to charitable projects, and with his more famous wife Nancy became a prominent fixture in upper class English society.

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.