That could be argued but there are many others too. The Gateway Arch in St. Louis is much taller and wider but with less mass at 630 ft x 630 ft. While the faces on Mt. Rushmore are only 60 ft tall with varying widths. But lets not forget the Crazy Horse monument that has been in the works since 1948 but is still far from completion. It is planned to be 563 feet high and a whopping 641 feet wide.
Washington Monument
It is within the territory of the United States of America, but is referred to as a US National PARK. A national monument is a different entity.
The Cadet Monument
The Four Corners monument can be found at the intersection of the states of Arizona, Colorado, New Mexico, and Utah on a US map.
Lincoln Memorial
The Wasginton monument was named after George Washington that was a big historical monument.
Bunker Hill Monument
Because it is the capital of the US
The Washington Monument was made to commemorate George Washington as a military leader in the US War of Independence and the first US President. It was created by Robert Mills a man from Charleston.
the golden gate bridge
Not yet, but there should be.
It has no practical use, it is a monument to commemorate the first President of the US.