The Helvetia Township post office opened in 1840, the earliest record of the town by name. Three smaller post offices, Helvetia (1840), Saint Morgan (1861) and Sebastopol (1884), opened inside today’s town and later closed.
2020 census: 8,329186 years
How historic is Helvetia Township?
B−
More historic than 53% of U.S. towns, on its age, its old homes and the National Register.
Founding year: the first Helvetia Township post office (Blevins & Helbock, CC0).
History grade
What drives Helvetia Township’s History grade
On its age, its old homes and the National Register, Helvetia Township is more historic than 53% of U.S. towns, #379 of 768 in Illinois. Its age holds the grade up; its National Register listings pull it down.
B−
HistoryA character grade: shown, never part of Helvetia Township’s overall grade.
Few Illinois towns list much on the Register (a typical Illinois town has 0.5 per 10,000 residents, the U.S. 2.4), so Helvetia Township’s 0.0 sits below most of its state (28% of Illinois towns have fewer) while its 0 listings outnumber those of 23% of U.S. towns.
How sure. Graded on any two of the three inputs instead, the letter would range from C to B+. The pre-1940 share is a Census survey estimate (±3.6 points). The founding year is the first post office, not a stated founding date.
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 Helvetia Township’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Lost post offices, old corners, places now gone and burying grounds
Three other post offices opened and closed inside today’s town.
Helvetia
1840–1843
Saint Morgan
1861–1898
Sebastopol
1884–1901
18401930today
Hamlets and corners on the map
Saint MorganSebastopol
Gone or out of use
Buckeye SchoolschoolEast Sugar Creek SchoolschoolForrest SchoolschoolLee SchoolschoolLinden SchoolschoolUnion Schoolschool
4cemeteries and burying grounds inside Helvetia Township
GullickHoytRietmann FamilySugar Creek Presbyterian
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
On the map
Helvetia Township on the map, 1906 to 1981
Every edition of the U.S. Geological Survey’s map of Helvetia Township. Tap a year, or press play to watch the town change.
1906Breese sheet · 1:62,500
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Helvetia Township.
The story so far
Helvetia Township, in brief
Wikipedia doesn’t have a history of Helvetia Township yet. The photos, dates and memories neighbors add here are how it gets written.
Helvetia Township is a township of the city Highland in Madison County, Illinois, in the United States. As of the 2010 census, its population was 8,646 and it contained 3,638 housing units.
Its first post office opened in 1840. Between the 2010 and 2020 censuses its population fell from 8,646 to 8,329 (-4%).
Intro from Wikipedia. Population: U.S. Census Bureau.
Timeline
Helvetia Township, 1840 to 1906
Woven from the archive, old maps, post office records, the National Register and the people born here.
The Helvetia Township post office opened in 1840, the earliest record of the town by name (U.S. post office records).
How does Helvetia Township rank for history?
Helvetia Township is more historic than 53% of U.S. towns, #379 of 768 in Illinois. 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.
How old are the homes in Helvetia Township?
12% of Helvetia Township’s homes were built before 1940 (Census estimate, ±3.6 points), against a typical 11% for an Illinois town; the median home was built in 1975.
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 U.S. Geological Survey historical maps, 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.
