- July 1, 1874 - After being delayed by the American Civil War, the Philadelphia Zoo opens.
- July 4, 1776 - The Declaration of Independence is adopted at Independence Hall.
- July 7, 1844 - A deadly Nativist riot erupts outside a Catholic church in Southwark.
- July 27, 1976 - The first recognized outbreak of Legionellosis begins at The Bellevue-Stratford Hotel.
