4 places in town are on the National Register, among them a historic district with 40 buildings. Below: 5 old photos and papers, maps from 1885 on, and the census since 1880.
On its age, its old homes and the National Register, Seneca is more historic than 74% of U.S. towns. Its National Register listings hold the grade up; its age pulls it down.
B+
HistoryA character grade: shown, never part of Seneca’s overall grade.
Kansas towns list more on the Register than most of the country (a typical Kansas town has 5.1 per 10,000 residents, the U.S. 2.4), so Seneca’s 206 sits above most of its state (98% of Kansas towns have fewer) while its 43 historic buildings outnumber those of 84% of U.S. towns.
How sure. Graded on any two of the three inputs instead, the letter would range from B− to A. The pre-1940 share is a Census survey estimate (±5.9 points). Two sources give 1857.
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 Seneca’s 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.
Every building
Seneca, building by building, 1885–1911
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.
Seneca was founded in 1857. It was named after Seneca County, Ohio. The first post office in Seneca was established in November 1858. Seneca grew up along the wagon route from St. Joseph, Missouri to Oregon and California. British explorer Richard Francis Burton en route to California in 1860 passed through town and noted: "... Seneca, a city consisting of a few shanties ..." Seneca was a station on the Pony Express of the early 1860s. The station was located in the Smith Hotel, at the present-day location of Fourth and Main Streets. Seneca was incorporated as a city in 1870.
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.
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 1857, according to Wikipedia’s history of the town. Seneca’s post office opened in 1858, and the census of 1880 counted 1,203 people here.
How does Seneca rank for history?
Seneca is more historic than 74% of U.S. towns. 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 Seneca?
4 listings: 2 buildings, among them the US Post Office-Seneca (listed 1989, the first), 1 historic district, the Seneca Main Street Historic District, with 40 contributing buildings, and 1 structure. 43 historic buildings in all.
How old are the homes in Seneca?
18% of Seneca’s homes were built before 1940 (Census estimate, ±5.9 points), against a typical 10% for a Kansas 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 (5), the Library of Congress (1), 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), 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.
1988
1988
2005