Yellowstone has nearly 3,500 square miles of territory. This equals over 2.2 million acres, which is larger than the states of Delaware and Rhode Island combined.
The vast majority--96% of Yellowstone--is in Wyoming. A further 3% of the park's territory is in Montana and 1% is in Idaho.
The park is so large that it employs more than 3,500 people in the peak seasons. This includes everyone from park guides to gas station attendants.
There are over 2,200 rooms, lodges and cabin spaces available throughout Yellowstone National Park. Additionally, there are 12 campsites and 2,000 campgrounds.
There are over 300 miles of paved roads within Yellowstone National Park. There are nine different museums and visitor centers and a total of more than 2,000 buildings.