Elizabeth Willing Powel (February 21, 1743 – January 17, 1830) was an American socialite and a prominent member of the upper class of Philadelphia in the late 18th and early 19th centuries. The daughter, later sister and then wife of mayors of Philadelphia, she was a salonnière who hosted frequent gatherings that became a staple of political life in the city. During the First Continental Congress in 1774, Powel opened her home to the delegates and their families, hosting dinner parties and other events. After the American Revolutionary War, she again took her place among the most prominent Philadelphian socialites, establishing a salon of the Republican Court of leading intellectuals and political figures.
Powel corresponded widely, including with the political elite of the time. She was a close friend and confidante to George Washington and was among those who convinced him to continue for a second term as president. She wrote extensively, but privately, on a wide range of subjects, including politics, the role of women, medicine, education, and philosophy. Powel is said to be the person who asked Benjamin Franklin, "What have we got, a republic or a monarchy?", to which he reportedly replied, "A republic ... if you can keep it", an often quoted statement about the Constitution of the United States. The exchange was first recorded by James McHenry, a delegate of the Constitutional Convention, in his journal entry dated September 18, 1787. Powel's exchange with Franklin was adapted over time, with the role played by Powel all but removed in 20th-century versions and replaced with an anonymous "lady", "woman", or "concerned citizen". The setting of the conversation was also revised from her home at the Powel House to the steps of Independence Hall.
Her husband, Samuel Powel, one of the richest people in Philadelphia was twice elected mayor of the city. He died in 1793 and left almost his entire estate to Powel, who went on to manage the family business dealings. She built a home for her nephew and chosen heir, John Hare Powel, on the country estate which she inherited from her husband. She sold the Powel House and lived on Chestnut Street near Independence Hall for the last three decades of her life; she died on January 17, 1830, and was buried beside her husband at Christ Church. More than a century later, the Powel House was acquired by the Philadelphia Society for the Preservation of Landmarks. It was renovated and opened to the public as a museum in 1938. Two rooms from the house were reconstructed as exhibits at museums in Philadelphia and New York City. The Powels' country estate later became part of Powelton Village in Philadelphia. Hundreds of her letters and several of her portraits survive.