Lake Oswego dates to 1847, and 15 of its places are on the National Register
More historic than 60% of U.S. towns · #35 of 142 in Oregon. What drives it
Most of Lake Oswego was built recently: 4% of its homes predate 1940 and the median home dates from 1982. Below: maps from 1914 on and the census since 1880.
Founding year: Wikidata. First post office: 1853.The full story ↓
History grade
What drives Lake Oswego’s History grade
On its age, its old homes and the National Register, Lake Oswego is more historic than 60% of U.S. towns, #35 of 142 in Oregon. Its age holds the grade up; its share of homes from before 1940 pulls it down.
B
HistoryA character grade: shown, never part of Lake Oswego’s 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 Lake Oswego’s 4.7 sits near the middle of its state (54% of Oregon towns have fewer) while its 19 historic buildings outnumber those of 79% of U.S. towns.
NoteThe founding year comes from Wikidata alone; no second source gives 1847.
How sure. Graded on any two of the three inputs instead, the letter would range from C+ to A−. The pre-1940 share (±1.0 points) is firm at this size.
Founding year: Wikidata (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 Lake Oswego’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
The Clackamas people once occupied the land that later became Lake Oswego, but diseases transmitted by European explorers and traders killed most of the natives. Before the influx of non-native people via the Oregon Trail, the area between the Willamette River and Tualatin River had a scattering of early pioneer homesteads and farms.
Settlers were encouraged by the Donation Land Claim Act of 1850 and the subsequent Homestead Act. Albert Alonzo Durham founded the town of Oswego in 1847, naming it after Oswego, New York. He built a sawmill on Sucker Creek (now Oswego Creek), the town's first industry.
In 1847, according to Wikidata. Lake Oswego’s post office opened in 1853, and the census of 1880 counted 96 people here.
How does Lake Oswego rank for history?
Lake Oswego is more historic than 60% of U.S. towns, #35 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 Lake Oswego?
15 listings: 14 buildings and 1 structure. 19 historic buildings in all.
How old are the homes in Lake Oswego?
4% of Lake Oswego’s homes were built before 1940 (Census estimate, ±1.0 points), against a typical 5.3% for an Oregon town; the median home was built in 1982.
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 (2), Wikidata (14), the National Register of Historic Places (15), 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.