Iowa Counties Page
History
Native Americans in the United States resided in what is now Iowa for thousands of years. The written history of Iowa begins with the proto-historic accounts of Native Americans by explorers such as Marquette and Joliet in the 1680s. Until the early 19th century Iowa was occupied exclusively by Native Americans and a few European traders, with loose political control by France and Spain.Iowa became part of the United States of America after the Louisiana Purchase in 1803. Beginning in the 1830s Euro-American settlements appeared in the Iowa Territory, U.S. statehood was acquired in 1846, and by 1860 almost the entire state was settled and farmed by Euro-Americans.
Source: Wikipedia