White people began settling in southwestern Butler County around 1866. In 1881, George Miller built a gristmill on the Big Blue River. He was pleasantly surprised to discover that so much waterpower was available so close to the river's headwaters, and this led him to name the mill "Surprise". Businesses and homes were established near the mill; and in 1883, a post office was established under the name "Surprise". The town plat was registered in 1884. In 1887, the Fremont, Elkhorn and Missouri Valley Railroad established a depot in Surprise, resulting in further expansion of local businesses. See also possible relationship with Surprise, Arizona.
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 (5), Wikidata (1), the National Register of Historic Places (1), Wikipedia, Wikidata and Wikipedia for famous people, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia), the US Post Offices dataset (Blevins & Helbock) and the USGS Geographic Names Information System. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.