Modi, who made his Twitter debut in January 2009, is the second most followed politician on Twitter, behind US President Barack Obama and ahead of Mitt Romney (USA).
Besides, he is also the third most followed world leader behind Obama and the Pope.
"Our PM Mr Modi has reached 10 million followers on Twitter," the micro-blogging site said in a statement today.
The site added that his election victory tweet was the most retweeted tweet in India in 2014.
Modi, an active social media user, has a fan base of more than 27 million on the world's largest social networking platform Facebook.