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County · code 36089

St. Lawrence CountyNew York

St. Lawrence County is a county in New York, with its seat in Canton. It was formed on March 3, 1802.

  • Founded1802
  • County seatCanton
  • Named forSt. Lawrence River
  • Land area2,680 sq mi + 142 sq mi water
  • Population108,505 2020 Census
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Updated

FranklinLewisHamiltonHerkimerJefferson Canton Census outline · seat marked

Where it is

St. Lawrence on the map of New York

New York has 62 counties and county equivalents, each with its own records office. Shapes with a page are links.

Albany CountyAllegany CountyBronx CountyBroome CountyCattaraugus CountyCayuga CountyChautauqua CountyChemung CountyChenango CountyClinton CountyColumbia CountyCortland CountyDelaware CountyDutchess CountyErie CountyEssex CountyFranklin CountyFulton CountyGenesee CountyGreene CountyHamilton CountyHerkimer CountyJefferson CountyKings CountyLewis CountyLivingston CountyMadison CountyMonroe CountyMontgomery CountyNassau CountyNew York CountyNiagara CountyOneida CountyOnondaga CountyOntario CountyOrange CountyOrleans CountyOswego CountyOtsego CountyPutnam CountyQueens CountyRensselaer CountyRichmond CountyRockland CountySaratoga CountySchenectady CountySchoharie CountySchuyler CountySeneca CountySteuben CountySuffolk CountySullivan CountyTioga CountyTompkins CountyUlster CountyWarren CountyWashington CountyWayne CountyWestchester CountyWyoming CountyYates CountySt. Lawrence County St. Lawrence
Counties of New York · St. Lawrence highlighted

History

Formed in 1802 from Clinton County

An old deed may name a county that no longer exists, or a boundary that has since moved.

St. Lawrence County was created from Clinton County on March 3, 1802. The county is named after the St. Lawrence River. On April 23, 1913, St. Lawrence County lost territory to Franklin County.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries.

  1. 1802
    St. Lawrence County created St. Lawrence created from Clinton.
    from Clinton
    · N.Y. Laws 1802, 25th sess., ch. 16/p. 24
  2. 1913
    Lost territory St. Lawrence lost to Franklin.
    to Franklin
    · N.Y. Laws 1913, 136th sess., ch. 385, sec. 1/p. 823

Land and parcels

What the maps cover in St. Lawrence

Who publishes each layer, how good it is, and when we last checked.

Official
from the office that keeps the record
Good enough
a reliable statewide or national copy
Fallback
a guide only; check the official record
Missing
nothing public found yet

People and land

St. Lawrence by the Census

Population
108,505 2020 Census count
Housing units
51,612 2020 Census count
Land area
2,680 square miles
Water area
142 square miles
People per sq mi
40 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

Rules and offices

St. Lawrence County's official site

We have found the county's site but not its offices yet; start there.

County government

See your own lot on these maps

Open St. Lawrence County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.

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Questions

Common questions about St. Lawrence County

When was St. Lawrence County founded?
St. Lawrence County was founded in 1802, formed from Clinton County, and named after St. Lawrence River.
What is the county seat of St. Lawrence County?
The county seat of St. Lawrence County is Canton.
Is there an online parcel map for St. Lawrence County?
Not that we have found yet. Lot lines and owners of record are kept by the county assessor's office. When a public parcel map appears, it shows here.
Has St. Lawrence County's boundary or name changed?
St. Lawrence County was created in 1802 from Clinton County. Since then the Atlas of Historical County Boundaries records 1 later change, chiefly involving Franklin County.
Is my lot in a flood zone?
We do not have flood maps for St. Lawrence County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby

Counties next door