Interior Department Formally Implements ‘Gulf of America,’ ‘Mount McKinley’ Name Changes

The agency said the U.S. Board on Geographic Names is working quickly to make the name changes ‘effective immediately for federal use.’

Visitors take in the view of Denali, formerly known as Mount McKinley, in Denali National Park, Alaska, on Sept. 1, 2015. Lance King/Getty Images

The U.S. Department of the Interior announced on Jan. 24 that it is formally implementing President Donald Trump’s efforts to rename the Gulf of Mexico and Denali, the tallest mountain in North America.

In a Jan. 24 statement, the Interior Department said, “The Gulf of Mexico will now officially be known as the Gulf of America” and that it would revert to Denali’s former official name, Mount McKinley.