The results meant Trump easily staved off a bid by opponents to turn Republican electors against him.
“Today marks a historic electoral landslide victory in our nation’s democracy. I thank the American people for their overwhelming vote to elect me as their next President of the United States,” Trump said in a statement.
Members of the Electoral College met in their respective state capitals to formally elect the next president moments after he crossed the necessary 270-vote mark.
He would be sworn in as the 45th US President on January 20.
“The official votes cast by the Electoral College exceeded the 270 required to secure the presidency by a very large margin, far greater than ever anticipated by the media,” Trump said.
“This election represents a movement that millions of hard working men and women all across the country stood behind and made possible,” he added.
“With this historic step we can look forward to the bright future ahead. I will work hard to unite our country and be the President of all Americans. Together, we will make America great again,” the 70-year-old businessman-turned- politician said.
In a tweet later, he took a dig at the media and its role during the general elections.
“We did it! Thank you to all of my great supporters, we just officially won the election (despite all of the distorted and inaccurate media),” Trump tweeted.
