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A+History
History · Delaware

36% of Delaware’s homes were built before 1940

More historic than 98% of U.S. towns. What drives it

7 places in town are on the National Register, among them two historic districts with 76 buildings between them. Below: 12 old photos and papers, maps from 1950 on, and the census since 1870.

7on the National Register
36%homes built before 1940
12old photos & papers
From Delaware’s archive · credits on each photo
Quick answers

About Delaware’s history

How historic is Delaware?

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More historic than 98% of U.S. towns, on its age, its old homes and the National Register.

What drives the grade ↓
History grade

What drives Delaware’s History grade

On its age, its old homes and the National Register, Delaware is more historic than 98% of U.S. towns. All 2 inputs put Delaware near the top nationally; its share of homes from before 1940 ranks highest.

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HistoryA character grade: shown, never part of Delaware’s overall grade.
All U.S. towns we grade (21,289)Ahead of 98%
NewerOlder

New York towns list more on the Register than most of the country (a typical New York town has 12.3 per 10,000 residents, the U.S. 2.4), so Delaware’s 367 sits above most of its state (89% of New York towns have fewer) while its 83 historic buildings outnumber those of 88% of U.S. towns.

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 (±9.5 points).

Founding year: our sources. 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 Delaware’s past

Read from the archive, the National Register and the record. The page puts what stands out first.

★ What stands out · Places that used to be

Lost post offices, old corners and burying grounds

Three other post offices opened and closed inside today’s town.

Callicoon
1849–today
Callicoon Depot
1849–1906
Falls Mills
1869–1894
Hall Mills
1877–1894
Kenoza Lake
1890–today
Hortonville
1897–today
18401930today
Hamlets and corners on the map
CallicoonFalls MillsHortonvilleKenoza LakeKohlertownLower BeechwoodUpper Beechwood
5cemeteries and burying grounds inside Delaware
BauernfeindHoly CrossKenoza LakeLaytonLong

US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).

On the National Register

7 listings protect 83 historic buildings

The country’s official list of buildings and places worth saving.

places listed
7
National Historic Landmarks
0
none yet
historic buildings protected
83
each building in a district counts
first listed
1976
Stone Arch Bridge
All 7 listings

National Park Service, National Register of Historic Places. Photos from Wikimedia Commons, credited on each place’s page.

By decade

Delaware, decade by decade

6 decades in the archive, from the 1810s to the 1930s. Scroll each row; tap a photo for its story.

The story so far

Delaware, in brief

Wikipedia doesn’t have a history of Delaware yet. The photos, dates and memories neighbors add here are how it gets written.

Delaware is a town in Sullivan County, New York, United States. The population was 2,203 at the 2020 census. The Town of Delaware is in the western part of the county.

Between the 2010 and 2020 censuses its population fell from 2,670 to 2,203 (-17%).

Intro from Wikipedia. Population: U.S. Census Bureau.

From the old history books

What they wrote about Delaware in 1908

Passages that mention Delaware, cut from the printed page as they were published.

two churches, a school house, a postoffice, two stores, a hotel, a smithy and a dozen or more dwellings. Kirkwood in the southeast lies partly in Red Lion Hundred and is a station on the Delaware Railroad with a passenger and freight depot, three stores, a hotel, a school house, a postoffice, a smi…
History of the state of Delaware1908 · page 527Read the page →
Read the text

two churches, a school house, a postoffice, two stores, a hotel, a smithy and a dozen or more dwellings. Kirkwood in the southeast lies partly in Red Lion Hundred and is a station on the Delaware Railroad with a passenger and freight depot, three stores, a hotel, a school house, a postoffice, a smithy and about a dozen houses. Summit Bridge lies south of the Delaware and Chesapeake canal, and is so called after a high bridge which once spanned the canal at that point. It has a church,

Text read by machine from the scan; it may contain errors.
" Plymouth " was a settlement founded by some Massachusetts colonists in the early sixties, southwest of Canterbury, The town was laid out in 1866, and was made a station by the Delaware railroad. Baptist and congregational churches were established here in 1867, but disbanded six years later, the …
History of the state of Delaware1908 · page 665Read the page →
Read the text

" Plymouth " was a settlement founded by some Massachusetts colonists in the early sixties, southwest of Canterbury, The town was laid out in 1866, and was made a station by the Delaware railroad. Baptist and congregational churches were established here in 1867, but disbanded six years later, the members joining the churches at Magnolia.

Text read by machine from the scan; it may contain errors.

Scans and text from the Internet Archive. Books published in 1930 or earlier, which are in the public domain.

Timeline

Delaware, 1810 to 1970

Woven from the archive, old maps, post office records, the National Register and the people born here.

  1. 19th century
  2. 1810In the archiveView on the Delaware
  3. 1835In the archiveUp the Delaware
  4. 1840In the archiveMonument on the banks of the Delaware River
  5. 1849Post officeThe Callicoon post office opens
  6. 1849Post officeThe Callicoon Depot post office opens
  7. 1855In the archiveOld Delaware bridge, Easton, Pa. 1855
  8. 1869Post officeThe Falls Mills post office opens
  9. 1875In the archiveCounty atlas of Sullivan, New York
  10. 1894Post officeThe Falls Mills post office closes
  11. 20th century
  12. 1904BuiltSt. Joseph's Seminary is built
  13. 1906Post officeThe Callicoon Depot post office closes
  14. 1939In the archiveFarmland along the upper Delaware River in New York state
  15. 1950On the mapFirst mapped by the U.S. Geological Survey
  16. 1970BuiltCallicoon National Bank is built
On the map

Delaware on the map, 1950 to 1962

Every edition of the U.S. Geological Survey’s map of Delaware. Tap a year, or press play to watch the town change.

Delaware on the 1950 USGS mapDelaware on the 1962 USGS map1950Scranton sheet · 1:250,000

U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Delaware.

Then & now

Stand where they stood

No then-and-now pairs yet. Take a photo from the same spot as an old one and they appear here side by side.

View on the Delaware
Retake this viewView on the Delaware, 1810

Find the spot, match the angle, and add your photo. It becomes the first then-and-now pair on Delaware’s page.

Retake this view · +15
People over time

Delaware, census by census

05001,0001,5002,0002,5003,00018801900192019401960198020002020Peak: 2,783

Between 1,541 and 2,783 people in every census since 1870.

16 censuses, 1870–2020.

U.S. Census Bureau decennial counts, from the census table on Delaware’s Wikipedia page.

Famous people

Famous people close to Delaware

Nobody well known was born in Delaware itself, so here are the best known from just nearby.

See all →
Help out

Finish Delaware’s story

Most archives stop around 1920. The photos from after that are in family albums, not libraries.

Decades since 1900 with photos
00s10s20s30s40s50s60s70s80s90s
1 of 10 decades. The empty ones are waiting for someone’s album.
Stories next door

History across the town line

Each neighbor’s History grade, on the same three inputs.

Questions about Delaware’s history

How does Delaware rank for history?

Delaware is more historic than 98% 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 Delaware?

7 listings: 4 buildings, 2 historic districts, the St. Joseph's Seminary and the Callicoon Downtown Historic District, with 76 contributing buildings, and 1 structure. 83 historic buildings in all.

How old are the homes in Delaware?

36% of Delaware’s homes were built before 1940 (Census estimate, ±9.5 points), against a typical 27% for a New York town; the median home was built in 1961.

Memory lane

What the archives can’t tell you, neighbors can.

Town Square →
Start a conversation
Sources

Where this page comes from

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 (1), the Library of Congress (11), the National Register of Historic Places (7), 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 old county and town histories (Internet Archive). Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.