- Jan 3 France, the United Kingdom, and Austria form an alliance against Russia and Prussia
- Jan 8 Battle of New Orleans (War of 1812); the war had ended on 24th December 1814 but none of the combatants knew
- Jan 15 War of 1812: the USS President, an American frigate, is captured by four British frigates
Library of Congress
Jan 30 Burned US Library of Congress re-established with Thomas Jefferson's 6,500 volumes