As of March 25, 2013, all US states have a National Park Unit, however, not all of the units are a national park or monument.
US states without a national park or monument are:
Illinois (has an historic site)
Kansas (has historic sites and a preserve)
New Hampshire (has an historic site)
Oklahoma (has a recreation area, an historic site, and a memorial)
Rhode Island (has a memorial)
Wisconsin (has a lake shore and a scenic river way)
Yellowstone National Park has always been located in the US state of Wyoming, with parts of the park located in the US states of Montana and Idaho.
There are so many of them streched throughout the US but most of the big ones are out west. There are about 390 National Park Service sites in the U.S.
In the United States, the US federal government owns national monuments and operated by National Park Service, a division of the US Dept. of the Interior.
Yellowstone National Park.
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.
Wrangell-St. Elias National Park in Alaska is home to the largest concentration of glaciers in the United States.
A park that is run by the US National Parks Dept.
Yellowstone National Park, the first National Park in the US, is located in Wyoming and Montana.
Yellowstone National Park, Grand Teton National Park, Fossil Butte National Monument, Devil's Tower National Monument, and Fort Laramie National Monument are all located in the US state of Wyoming.
Yellowstone National Park is located in the United States in the state of Wyoming.
Yellowstone National Park is located mainly in the state of Wyoming, though it also extends in to Montana and Idaho, in the United States of America. It is administrated and governed by the US National Park Service which is an agency of the United States Government.
Well, there are many national parks in the us but a few of them are Yellowstone national park, Yosemite national park, and hot springs national parks are just a few of the many national parks.