Portal:United States/Anniversaries/October/October 30
- 1735 – John Adams (pictured), champion of the Declaration of Independence, second President of the United States, and Founding Father, was born.
- 1831 – In Southampton County, Virginia, escaped slave Nat Turner is captured and arrested for leading the bloodiest slave rebellion in United States history.
- 1864 – Helena, Montana is founded after four prospectors discover gold at "Last Chance Gulch".
- 1938 – Orson Welles broadcasts his radio play of H. G. Wells's The War of the Worlds, causing anxiety in some of the audience in the United States.
- 1945 – Jackie Robinson of the Kansas City Monarchs signs a contract for the Brooklyn Dodgers to break the baseball color barrier.