The order signed on Saturday, allows government agencies and organisations that receive federal funding to choose whether to continue to offer documents and services in language other than English.
It rescinds a mandate from former President Bill Clinton that required the government and organisations that received federal funding to provide language assistance to non-English speakers.
"Establishing English as the official language will not only streamline communication but also reinforce shared national values, and create a more cohesive and efficient society," according to the order.
"In welcoming new Americans, a policy of encouraging the learning and adoption of our national language will make the United States a shared home and empower new citizens to achieve the American dream," the order says.
"Speaking English not only opens doors economically, but it helps newcomers engage in their communities, participate in national traditions, and give back to our society."
More than 30 states have already passed laws designating English as their official language, according to US English, a group that advocates for making English the official language in the United States.
For decades, lawmakers in Congress have introduced legislation to designate English as the official language of the US, but those efforts have not succeeded.
Within hours of Trump's inauguration last month, the new administration took down the Spanish language version of the official White House website.
Hispanic advocacy groups and others expressed confusion and frustration at the change.
The White House said at the time it was committed to bringing the Spanish language version of the website back online. As of Saturday, it was still not restored.
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