Chillicothe is a city in Wapello County, Iowa, United States. The population was 76 at the 2020 census. Chillicothe was laid out in 1849 and was …Chillicothe is a city in Wapello County, Iowa, United States. The population was 76 at the 2020 census. Chillicothe was laid out in 1849 and was incorporated in 1881. The word "Chillicothe" is derived from the ancient Shawnee Indian words meaning "Principal Place." It was the name for one of their clans. The main chief of the Shawnee could only come from the Chillicothe clan. When a village was called Chillicothe, it meant that it was home to the principal chief. It was the capital city of the Shawnees until the death of the chief. Then, the capitol would move to the home village of the next main chief. That village would then become Chillicothe.
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