 Pacific was established in 1854 when it was sectioned off from the neighboring city of Portage.Its first elected official was N.H. Wood, the owner of a large portion of the land within the town's borders.According to the United States Census Bureau, the town has a total area of 21.6 square miles (55.9 km²), of which, 20.3 square miles (52.7 km²) of it is land and 1.3 square miles (3.3 km²) of it (5.88%) is water.