What century is 2010?

21st
The twentyfirst century.

21st century.

Answer: In 2000, it became the 21st century, and still will be when you and me are dead, the next will be 2100 since a century is 100 years. The last century was from 1900-1999.

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the 21st
We are currently in the 21st century. It became the twenty first century in the year 2000. When the year 2100 comes it will then be the 22nd century. Every one hundred years becomes a new century.