Green Bay, Wisconsin, is a city with a total area of about 144.94 square kilometers (55.76 square miles). Of this, roughly 117.77 square kilometers (45.48 square miles) is land, and 27.17 square kilometers (10.28 square miles) is water. The city had a population of 107,395 as of the 2020 census. Green Bay lies at the mouth of the Fox River on a bay of Lake Michigan, and the metropolitan area has about 335,000 residents.
If the question refers to the size of the bay itself (Green Bay, the bay of Lake Michigan), it extends approximately 190 kilometers (118 miles) southwestward and is about 37 kilometers (23 miles) at its widest point.
