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A+History
History · Cohoes

Cohoes’ historic district, a National Historic Landmark, takes in 298 buildings

More historic than 97% of U.S. towns · #75 of 758 in New York. What drives it

17 places in town are on the National Register, among them 2 National Historic Landmarks and six historic districts with 486 buildings between them. Below: 6 old photos and papers, maps from 1885 on, and the census since 1850.

1832first post office
17on the National Register
40%homes built before 1940
6old photos & papers
14famous people
From Cohoes’ archive · credits on each photo
Quick answers

How Cohoes began

When was Cohoes founded?

1832

The Cohoes post office opened in 1832, the earliest record of the town by name. Wikidata gives 1913.

First census: 4,229 in 18502020 census: 18,147194 years

How historic is Cohoes?

A+

More historic than 97% of U.S. towns, on its age, its old homes and the National Register.

What drives the grade ↓
Founding year: the first Cohoes post office (Blevins & Helbock, CC0). Wikidata: 1913.The full story ↓
History grade

What drives Cohoes’ History grade

On its age, its old homes and the National Register, Cohoes is more historic than 97% of U.S. towns, #75 of 758 in New York. All 3 inputs are above most U.S. towns; its share of homes from before 1940 ranks highest and its age lowest.

A+
HistoryA character grade: shown, never part of Cohoes’ overall grade.
All U.S. towns we grade (21,289)Ahead of 97%
NewerOlder
New York towns of 2,500+ (758)Ahead of 90%

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 Cohoes’ 274 sits above most of its state (85% of New York towns have fewer) while its 498 historic buildings outnumber those of 97% of U.S. towns.

How sure. Graded on any two of the three inputs instead, the letter would range from A to A+. The pre-1940 share is a Census survey estimate (±5.1 points). The founding year is the first post office, not a stated founding date; Wikidata gives 1913.

Founding year: the first post office (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 Cohoes’ past

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

★ What stands out · On the National Register

17 listings protect 498 historic buildings

The country’s official list of buildings and places worth saving. 2 are National Historic Landmarks, the highest tier.

places listed
17
National Historic Landmarks
2
Harmony Mill No. 3
historic buildings protected
498
each building in a district counts
first listed
1971
Harmony Mill No. 3
All 17 listings

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

On the map

Cohoes on the map, 1893 to 1980

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

Cohoes on the 1893 USGS mapCohoes on the 1929 USGS mapCohoes on the 1947 USGS mapCohoes on the 1954 USGS mapCohoes on the 1978 USGS mapCohoes on the 1980 USGS map1893Cohoes 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 Cohoes.

The story

How Cohoes came to be

From Wikipedia’s history of Cohoes.

Read it all →

In the early years of Dutch colonial settlement, the majority of the city's territory was once part of the area of Manor of Rensselaerswyck, a feudal-style manor or patroonship. The land north of a line crossing the Cohoes Falls (today Manor Avenue) was outside the Manor and was owned by the Van Olohde family between 1725 and 1750. Rensselaerswyck was established by Killiaen Van Rensselaer, the patroon and a Dutch merchant. In 1632, he had an agent pace off an enormous triangle-shaped area around the confluence of the Mohawk and Hudson rivers, from the Peebles Island northwest to the Cohoes Falls and south to today's Watervliet; this area was the core of the future city of Cohoes. Starting in the 1690s the Patroon began to issue leases for the area of Cohoes, reserving for himself a strip below the Cohoes Falls for the future site of mills powered by water.

Text from Wikipedia, licensed CC BY-SA 4.0.

From the old history books

What they wrote about Cohoes in 1877

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

The project of uniting Lansingburg and Cohoes by bridges across the Hudson and Mohawk rivers, which had been agitated in the papers of the vicinity at different times previous, assumed definite shape by the incorporation of the Lansingburg and Cohoes Bridge Co. in March. The bill provided for the c…
The history of Cohoes, New York, from its earliest settlement to the present time1877 · page 210Read the page →
Read the text

The project of uniting Lansingburg and Cohoes by bridges across the Hudson and Mohawk rivers, which had been agitated in the papers of the vicinity at different times previous, assumed definite shape by the incorporation of the Lansingburg and Cohoes Bridge Co. in March. The bill provided for the construction of " a bridge and the approaches thereto, over the Hudson from some point on Van Schaick's Island, in the city of Cohoes to some point in the

Text read by machine from the scan; it may contain errors.
recently at Northside. In relation to this, the following, published in the Albany Evening Journal in 1859, will be of interest: " About the 5th of June, 1839, Moore received a letter from some person, a resident of the village of Cohoes, which so attracted his notice that he spoke of it to Daniel …
The history of Cohoes, New York, from its earliest settlement to the present time1877 · page 13Read the page →
Read the text

recently at Northside. In relation to this, the following, published in the Albany Evening Journal in 1859, will be of interest: " About the 5th of June, 1839, Moore received a letter from some person, a resident of the village of Cohoes, which so attracted his notice that he spoke of it to Daniel Webster, whom, on the 9th of June, he met at dinner.

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

Cohoes, 1760 to 1999

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

  1. 18th century
  2. 1760In the archiveA view of the Cohoes or Great Fall of the Mohawk River taken from above
  3. 19th century
  4. 1828In the archiveMills at Cohoes Falls
  5. 1832Post officeThe Cohoes post office opens
  6. 1839Born hereJames A. Herne is born here
  7. 1870Born hereGeorge Davis is born here
  8. 1874BuiltMusic Hall is built
  9. 1893On the mapFirst mapped by the U.S. Geological Survey
  10. 20th century
  11. 1910BuiltDelaware and Hudson Railroad Freight House is built
  12. 1910CensusPopulation peaks at 24,709
  13. 1913Born hereCarmen Mastren is born here
  14. 1962Born hereJohn T. McDonald III is born here
  15. 1999LandmarkHarmony Mill No. 3 named a National Historic Landmark
  16. 1999LandmarkHarmony Mill Historic District named a National Historic Landmark
By decade

Cohoes, decade by decade

2 decades in the archive, from the 1760s to the 1820s. Scroll each row; tap a photo for its story.

Every building

Cohoes, building by building, 1885–1910

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.

Cohoes fire insurance map, 1885, sheet 11885Sheet 1 of 13
Edition
BrickWoodStone

Sanborn Map Company, via the Library of Congress. Editions published in 1930 or earlier, which are in the public domain.

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.

A view of the Cohoes or Great Fall of the Mohawk River taken from above
Retake this viewA view of the Cohoes or Great Fall of the Mohawk River taken from above, 1760

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

Retake this view · +15
People over time

Cohoes, census by census

05,00010,00015,00020,00025,0001850190019502000Peak: 24,709

Peaked at 24,709 in 1910; 18,147 people lived here in 2020.

18 censuses, 1850–2020.

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

Famous people

14 famous people were born in Cohoes

Writers, athletes, leaders and more, ranked by how widely they’re known.

See all →
Places that used to be

Places now gone and burying grounds

Cohoes’s post office has been open since 1832.

Gone or out of use
Cohoes Memorial HospitalhospitalPublic School Number 1schoolPublic School Number 4schoolSacred Heart ConventchurchSaint Agnes Conventchurch
2cemeteries and burying grounds inside Cohoes
CalvarySaint Agnes

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

Help out

Finish Cohoes’s story

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

Decades since 1900 with photos
00s10s20s30s40s50s60s70s80s90s
0 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 Cohoes’ history

What year was Cohoes founded?

The Cohoes post office opened in 1832, the earliest record of the town by name (U.S. post office records). Wikidata gives 1913.

How does Cohoes rank for history?

Cohoes is more historic than 97% of U.S. towns, #75 of 758 in New York. 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 Cohoes?

17 listings, 2 of them National Historic Landmarks: 10 buildings, among them the Harmony Mill No. 3 (a National Historic Landmark since 1999), 6 historic districts with 486 contributing buildings, and 1 structure. 498 historic buildings in all.

How old are the homes in Cohoes?

40% of Cohoes’ homes were built before 1940 (Census estimate, ±5.1 points), against a typical 27% for a New York town; the median home was built in 1954.

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 the Library of Congress (6), the National Register of Historic Places (17), 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, Sanborn fire insurance maps (Library of Congress) 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.