how big is yellowstone national park

Yellowstone National Park is about 3,472 square miles in size, which is roughly 2,221,766 acres (around 8,991 square kilometers). It stretches approximately 63 miles from north to south and 54 miles from east to west. The park is larger than the states of Rhode Island or Delaware. It is mostly located in Wyoming (96%), with small portions in Montana (3%) and Idaho (1%).