- March 1 – the Constitution of Finland is rewritten.
- March 1 – Hans Blix assumes the position of Executive Chairman of UNMOVIC.
- March 9 – FBI arrests suspected purveyor of art forgeries, Ely Sakhai, in New York City.
- March 10 – The NASDAQ Composite Index reaches an all-time high of 5048. ()
- March 18 – 2000 Taiwanese presidential election: Chen Shui-bian is elected President of the Republic of China.
- March 20 – Jamil Abdullah Al-Amin, a former Black Panther, is captured after gun battle that left a sheriff's deputy dead.
- March 26 – Presidential elections in Russia: Vladimir Putin elected President.
- March 30 – America's Cup 2000 retained by Team New Zealand near Auckland. Prada Challenge 2000 lost 0–5 in a "best-of-9".