Most of Johnstown was built recently: 9% of its homes predate 1940 and the median home dates from 1972. Below: maps from 1950 on and the census since 1920.
The Johnstown post office opened in 1883, the earliest record of the town by name. Another post office, Evergreen (1881), opened inside today’s town and later closed.
First census: 290 in 19202020 census: 47143 years
How did Johnstown get its name?
Johnstown was named for John Berry, an original owner of the town site.
Johnstown was platted in 1883 when the Fremont, Elkhorn and Missouri Valley Railroad was extended to that point. It was named for John Berry, an original owner of the town site.
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 (3), 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.