Allouez is a village in Brown County in the U.S. state of Wisconsin. The population was 14,156 at the 2020 census. It is part of the Green Bay Metropolitan Statistical Area. Allouez is located between Green Bay to the north, and De Pere to the south. The Fox River forms a natural border to the west and the East River to the east. According to the United Stat…Allouez is a village in Brown County in the U.S. state of Wisconsin. The population was 14,156 at the 2020 census. It is part of the Green Bay Metropolitan Statistical Area. Allouez is located between Green Bay to the north, and De Pere to the south. The Fox River forms a natural border to the west and the East River to the east. According to the United States Census Bureau, the village has a total area of 5.15 square miles, of which, 4.61 square miles of it is land and 0.54 square miles is water.