Kelso dates to 1847, and 23% of its homes were built before 1940
More historic than 82% of U.S. towns · #9 of 285 in Washington. What drives it
Its Register listings are the Nat Smith House, the US Post Office-Kelso Main and the Adam Catlin House. Below: 9 old photos and papers, maps from 1891 on, and the census since 1890.
Founding year: Wikipedia. First post office: 1877.The full story ↓
History grade
What drives Kelso’s History grade
On its age, its old homes and the National Register, Kelso is more historic than 82% of U.S. towns, #9 of 285 in Washington. All 2 inputs are above most U.S. towns; its share of homes from before 1940 ranks highest and its National Register listings lowest.
A−
HistoryA character grade: shown, never part of Kelso’s overall grade.
Few Washington towns list much on the Register (a typical Washington town has 0.1 per 10,000 residents, the U.S. 2.4), so Kelso’s 2.4 sits above most of its state (66% of Washington towns have fewer) while its 3 listings outnumber those of 65% of U.S. towns.
NoteThe founding year comes from Wikipedia alone; no second source gives 1847.
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 (±5.0 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 Kelso’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Fire insurance maps drew every building, what it was made of and what it was used for, so insurers could price the risk of fire. Pick a year, then a sheet.
1891Sheet 1 of 1
Edition
Sheets
BrickWoodStone
Sanborn Map Company, via the Library of Congress. Editions published in 1930 or earlier, which are in the public domain.
Places that used to be
Lost post offices and old corners
Kelso’s post office has been open since 1886. Two other post offices opened and closed inside today’s town.
Coweeman
1877–1882
Kelso
1886–today
Catlin
1892–1909
18701950today
Hamlets and corners on the map
Longview JunctionWest Kelso
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
On the map
Kelso on the map, 1921 to 1990
Every edition of the U.S. Geological Survey’s map of Kelso. Tap a year, or press play to watch the town change.
1921Kalama 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 Kelso.
The earliest known inhabitants of the area were the Cowlitz people, part of the Sahaptin and Salish people. About 6,000 Cowlitz were living in longhouses in villages along the Cowlitz River in 1855. The Cowlitz Tribe met with others at the Chehalis River Treaty Council in 1855 and declined to sign a treaty with the Washington Territory which would have required them to move away to a reservation. Many remained in the area until the tribe received federal recognition: its current headquarters is in nearby Longview.
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 1847, according to Wikipedia’s history of the town. Kelso’s post office opened in 1877, and the census of 1890 counted 354 people here.
How does Kelso rank for history?
Kelso is more historic than 82% of U.S. towns, #9 of 285 in Washington. 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 Kelso?
Three places: the Nat Smith House (listed 1975), the US Post Office-Kelso Main (1991) and the Adam Catlin House (1994).
How old are the homes in Kelso?
23% of Kelso’s homes were built before 1940 (Census estimate, ±5.0 points), against a typical 4.3% for a Washington town; the median home was built in 1963.
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 (9), the Library of Congress (1), Wikidata (3), the National Register of Historic Places (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), the USGS Geographic Names Information System and Sanborn fire insurance maps (Library of Congress). Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.
1939
1998
1998
1998
1998
1998
2007