2001 (MMI) was a common year starting on Monday (dominical letter G) of the Gregorian calendar, the 2001st year of the Common Era (CE) and Anno Domini (AD) designations, the 1st year of the 3rd millennium, the 1st year of the 21st century, and the 2nd year of the 2000s decade.
2001 was designated as:
- International Year of Volunteers