St. Helens dates to 1845, and 17% of its homes were built before 1940
More historic than 90% of U.S. towns · #3 of 142 in Oregon. What drives it
2 places in town are on the National Register, among them a historic district with 101 buildings. Below: 3 old photos and papers, maps from 1943 on, and the census since 1880.
Founding year: Wikipedia. First post office: 1850.The full story ↓
History grade
What drives St. Helens’ History grade
On its age, its old homes and the National Register, St. Helens is more historic than 90% of U.S. towns, #3 of 142 in Oregon. All 2 inputs are above most U.S. towns; its National Register listings ranks highest and its share of homes from before 1940 lowest.
A
HistoryA character grade: shown, never part of St. Helens’ overall grade.
Oregon towns list more on the Register than most of the country (a typical Oregon town has 2.9 per 10,000 residents, the U.S. 2.4), so St. Helens’ 71.5 sits above most of its state (92% of Oregon towns have fewer) while its 102 historic buildings outnumber those of 90% of U.S. towns.
NoteThe founding year comes from Wikipedia alone; no second source gives 1845.
How sure. Graded on two of the three inputs, so a change in either one moves the letter more than it would with three. The pre-1940 share is a Census survey estimate (±3.3 points).
Founding year: Wikipedia (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 St. Helens’ past
Read from the archive, the National Register and the record. The page puts what stands out first.
National Park Service, National Register of Historic Places. Photos from Wikimedia Commons, credited on each place’s page.
Places that used to be
Lost post offices, old corners and places now gone
Three other post offices opened and closed inside today’s town.
Plymouth
1850–1850
Saint Helen
1850–1913
Houlton
1890–1946
Saint Helens
1913–today
18501940today
Hamlets and corners on the map
McNultySaint HelensWest Saint Helens
Gone or out of use
Boise Cascade ParkparkCormicklocaleHigh School Post Officepost officeJohn Gumm Elementary SchoolschoolMcBride SchoolschoolSaint Helens Station A Post Officepost office
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
The Lewis and Clark Expedition passed through and camped in the area that is now St. Helens on the night of November 5, 1805, while on their way to the Pacific Ocean. While there, the party encountered Native Americans and Clark observed "low rockey clifts".
Nothing in the archives for these yearsWeddings on Main Street, storms, parades, school pictures, the old store. If it’s in your family album, it belongs here.
Nothing in the archives for these yearsWeddings on Main Street, storms, parades, school pictures, the old store. If it’s in your family album, it belongs here.
In 1845, according to Wikipedia’s history of the town. St. Helens’ post office opened in 1850, and the census of 1880 counted 209 people here.
How does St. Helens rank for history?
St. Helens is more historic than 90% of U.S. towns, #3 of 142 in Oregon. 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 St. Helens?
Two places: the Cox-Williams House (listed 1982) and the St. Helens Downtown Historic District (1984).
How old are the homes in St. Helens?
17% of St. Helens’ homes were built before 1940 (Census estimate, ±3.3 points), against a typical 5.3% for an Oregon town; the median home was built in 1985.
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 (7), Wikidata (2), the National Register of Historic Places (2), 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.