- Jan 17 A group of Modoc warriors defeats the United States Army in the First Battle of the Stronghold, a part of the Modoc War.
- Jun 5 Sultan Bargash closes slave market of Zanzibar
- Sep 18 Government bond agent Jay Cooke & Co collapses, causing panic on Wall St, the start of the panic of 1873 and the Long depression
Levi Strauss and Jacob Davis patent the first blue jeans with copper rivets
On May 20, 1873