New Berlin’s post office opened in 1837, and 4 of its places are on the National Register
More historic than 60% of U.S. towns · #158 of 362 in Wisconsin. What drives it
Most of New Berlin was built recently: 4% of its homes predate 1940 and the median home dates from 1978. Below: maps from 1891 on and the census since 1960.
The New Berlin post office opened in 1837, the earliest record of the town by name. Wikidata gives 1840. Three smaller post offices, Prospect Hill (1851), Calhoun (1882) and Prospect (1883), opened inside today’s city and later closed.
First census: 15,788 in 19602020 census: 40,451189 years
How historic is New Berlin?
B
More historic than 60% of U.S. towns, on its age, its old homes and the National Register.
Founding year: the first New Berlin post office (Blevins & Helbock, CC0). Wikidata: 1840.The full story ↓
History grade
What drives New Berlin’s History grade
On its age, its old homes and the National Register, New Berlin is more historic than 60% of U.S. towns, #158 of 362 in Wisconsin. Its age holds the grade up; its share of homes from before 1940 pulls it down.
B
HistoryA character grade: shown, never part of New Berlin’s overall grade.
Wisconsin towns list more on the Register than most of the country (a typical Wisconsin town has 3.0 per 10,000 residents, the U.S. 2.4), so New Berlin’s 1.5 sits near the middle of its state (59% of Wisconsin towns have fewer) while its 6 historic buildings outnumber those of 72% of U.S. towns.
How sure. Graded on any two of the three inputs instead, the letter would range from C+ to A−. The pre-1940 share (±1.2 points) is firm at this size. The founding year is the first post office, not a stated founding date; Wikidata’s 1840 falls in the same era, so the grade doesn’t depend on which one is used.
Founding year: the first post office (other dates in Quick answers). Homes: Census ACS 2020–24. National Register: National Park Service, May 2026 list; each listing counted once (boundary changes and added documentation belong to their listing), and a historic district counts its contributing buildings. How TownRatings grades history →
What stands out about New Berlin’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
The first settlers, Sidney Evans and P.G. Harrington, arrived in the northeastern part of what is now New Berlin in 1836. The area first came under local government in 1838 as part of the Town of Muskego, which at the time was composed of New Berlin and Muskego. The area that is now New Berlin was separated from Muskego in 1839 and named the Town of Mentor.
The New Berlin post office opened in 1837, the earliest record of the town by name (U.S. post office records). Wikidata gives 1840.
How does New Berlin rank for history?
New Berlin is more historic than 60% of U.S. towns, #158 of 362 in Wisconsin. The History grade combines the town’s founding era, the share of homes built before 1940 and its National Register listings. It’s a character grade, so it isn’t part of the overall grade. How it works.
What is on the National Register in New Berlin?
4 listings: 3 buildings, among them the Gredler-Gramins House (listed 1980, the first), and 1 site. 6 historic buildings in all.
How old are the homes in New Berlin?
4% of New Berlin’s homes were built before 1940 (Census estimate, ±1.2 points), against a typical 12% for a Wisconsin town; the median home was built in 1978.
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).
From Wikimedia Commons (10), Wikidata (2), the National Register of Historic Places (4), 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.