Underwood is located in Norwalk Township, so the early history of the township is also of the town. The historical information provided here was taken from a book on Pottawattamie County's past. The principal early settlers of the area arrived during the period from 1845 to 1850. In 1847, a flour mill and a saw mill were built on Mosquito Creek, southwest of the present site of Underwood. In 1850, the flour mill was destroyed by a flood. The first school was built in 1863, and soon more homes were built near the school and saw mill. It became known as Downsville. A post office was established there.
Passages that mention Underwood, cut from the printed page as they were published.
History of Pottawattamie County, Iowa, from the earliest historic times to 19071907Read the page →
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The town of Underwood was started simultaneous with the advent of the Rock Island Railroad and has made steady growth since that time. At this writing (1907) it has three general stores, one drug store, two hotels, one restaurant, one meat market, one lumber yard, with large stock, one livery stable, one machine shop, one blacksmith shop, which, in addition, handles farming implements; one harness shop, one shoe and harness repair shop, one creamery, two elevators, one savings hank, two barber shops, one cement block factory.
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Scans and text from the Internet Archive. Books published in 1930 or earlier, which are in the public domain.
Founding dates: Wikidata, Wikipedia, the U.S. post office records of Blevins & Helbock (CC0) and the Census. Homes by year built: Census ACS 2020–24. National Register of Historic Places: National Park Service (list of May 22, 2026). Old photos, postcards and papers: Wikimedia Commons, the Library of Congress and other public archives, credited on each item’s page. Maps: U.S. Geological Survey historical topographic maps (via Esri) and Sanborn fire-insurance maps (Library of Congress). History text and census tables: Wikipedia (CC BY-SA 4.0). Places that used to be: USGS Geographic Names Information System (2021). How TownRatings grades history →
From Wikimedia Commons (2), Wikipedia, the US Post Offices dataset (Blevins & Helbock), the USGS Geographic Names Information System and old county and town histories (Internet Archive). Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.
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