In 1787, the Northwest Ordinance was enacted, creating the Northwest Territory, which was bounded by the Great Lakes and the Ohio and Mississippi Rivers. The Northwest Territory (1787) was one of the earliest territories of the United States, stretching northwest from the Ohio River to northern Minnesota and the upper-Mississippi. Because the Northwest Territory lay between the East Coast and the then-far-West, the states carved out of it were called the "Northwest". The states of the "old Northwest" are now called the "East North Central States" by the United States Census Bureau, with the "Great Lakes region" being also a popular term. The states just west of the Mississippi River and the Great Plains states are called the "West North Central States" by the Census Bureau. Some entities in the Midwest are still referred to as "Northwest" for historical reasons (for example, Northwestern University in Illinois).