There are 21 cities in St. Lawrence County, New York.

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City
Rank
State
2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
Massena1New York10,06210,234-0.47%2,2244.52
Ogdensburg2New York8,65710,068-3.74%1,7474.96
Potsdam3New York8,5228,472-0.21%1,7334.92
Canton4New York7,1737,364-0.15%1,9733.63
Gouverneur5New York3,7123,6190.9%1,6942.19
Norwood6New York1,5301,566-0.78%7302.10
Waddington7New York934936-0.21%4282.18
Hannawa Falls8New York8921,040 1745.13
Norfolk9New York869886 3212.70
Madrid10New York822805 2213.73
Heuvelton11New York7257170.42%9530.76
Star Lake12New York649540 1504.34
Parishville13New York647623 1963.29
Hailesboro14New York627776 1334.70
Brasher Falls15New York510605 3101.64
Rensselaer Falls16New York320321 1,1000.29
Hammond17New York286285 4880.59
Colton18New York274290 1651.66
Richville19New York259266-0.77%3510.74
Winthrop20New York235174 852.78
Cranberry Lake21New York124126 619.42
showing: 21 rows

Cities in St. Lawrence County, New York by Population (2024)

What is the largest city in St. Lawrence County, New York?

Massena is the largest city in St. Lawrence County.

What is the smallest city in St. Lawrence County, New York?

Cranberry Lake is the smallest city in St. Lawrence County.

How many cities are in St. Lawrence County?

There are 21 cities in St. Lawrence County, New York.

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