A courthouse square was planned in the area that would become Firth sometime before 1860. However, due to Firth's remote location, residents would have had to travel to Nebraska City for supplies, meaning that the area remained largely uninhabited by non-Natives for many years. Firth was settled in the early 1870s, as the Atchison & Nebraska Railroad was extended toward Lincoln. The post office was established in 1872, named for Superintendent Frank Firth of the Atchison & Nebraska Railroad, and was incorporated in 1879.
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), Wikipedia, 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.