- Mar 3 Missouri Compromise passes, allowing Missouri to join the United States despite slavery still being legal there.
- Mar 5 Dutch city of Leeuwarden forbids Jews to go to synagogues on Sundays
- Mar 9 -11) Philippines chases out foreigners; about 125 die
- Mar 15 Maine admitted as 23rd state of the Union
- Mar 25 Greece freedom revolt against anti Ottoman attack