Template:Wp-Porter County, Indiana-History

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The Porter County area was occupied by an Algonquian people dubbed Huber-Berrien. This subsistence culture arrived after the glaciers retreated around 15,000 years ago and the rise of glacial Lake Algonquian, 4–8,000 years ago. The native people of this area were next recorded during the Iroquois Wars (1641–1701) as being Potawatomi and Miami. The trading post system used by the French and then the English encouraged native people to live in central villages along major waterways. Therefore, there are no recorded villages within Porter County's current boundaries. It was not until 1830 when Chiqua's town and Tassinong appear on maps and in records.^[1] Chiqua's town is a mile east of Valparaiso on State Route 2, the old Sauk Trail. Tassinong is south of Valparaiso about on State Route 49 at Baum's Bridge Road, the main route across the Great Kankakee Marsh.

After the American Revolutionary War established US sovereignty over the territory of the upper midwest, the new federal government defined the Northwest Territory in 1787 which included the area of present-day Indiana. In 1800, Congress separated Ohio from the Northwest Territory, designating the rest of the land as the Indiana Territory. President Thomas Jefferson chose William Henry Harrison as the governor of the territory, and Vincennes was established as the capital. After the Michigan Territory was separated and the Illinois Territory was formed, Indiana was reduced to its current size and geography. By December 1816 the Indiana Territory was admitted to the Union as a state.

The Indiana State Legislature passed an omnibus county bill on 7 February 1835 that authorized the creation of thirteen counties in northeast Indiana, including Porter. In 1837 the county was organized. It was named for Capt. David Porter, naval officer during the Barbary Wars and the War of 1812.

In 1962, Bethlehem Steel built a large integrated steel mill on the shores of Lake Michigan, which is now owned and operated by Cleveland-Cliffs. The construction of the mill, as well as the neighboring Port of Indiana, generated enormous controversy between industrial interests and locals who wanted to conserve the natural shoreline and habitat. Although the activists lost and the steel mill and port were constructed, the US Congress created the Indiana Dunes National Lakeshore in 1966 to protect the area's unique natural habitat.