Peabody is a city in Marion County, Kansas, United States. It is named after F.H. Peabody, of Boston, former vice-president of the Atchison, Topeka and Santa Fe Railway. Peabody is well known in the region for its Independence Day Celebration on July 4, and its historic 1880s downtown main street. As of the 2010 census, the city population was 1,210.For millennia, the Great Plains of North America were inhabited by nomadic Native Americans. From the 16th to 18th centuries, the Kingdom of France claimed ownership of large parts of North America. In 1762, after the French and Indian War, France secretly ceded New France to Spain, by the Treaty of Fontainebleau.In 1802, Spain returned most of the land to France, keeping title to about 7,500 square miles. In 1803, most of the land for modern day Kansas was acquired by the United States from France as part of the 828,000 square mile Louisiana Purchase.