What word starts with y that has to do with the us?

Yankee Stadium is in New York City. York is the name of a city in Alabama, Nebraska, North Dakota, Pennsylvania and South Carolina. Yuma is the name of a county in Arizona and Colorado. Youngstown, Ohio is the home of Youngstown State University. There is also a Youngstown, AZ.

Yellowstone National Park is one of the few places in the world with geysers. Yosemite is another famous national park.