There are 44 zip codes in St. Lawrence County, New York. The most populated is 13662, located in Massena. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
1366216,117Massena
1366916,044Ogdensburg
1367614,179Potsdam
1361712,124Canton
136429,237Gouverneur
136683,200Norwood
136673,171Norfolk
136132,604Brasher Falls
136542,380Heuvelton
136582,326Lisbon
136462,257Hammond
136992,021Potsdam
136971,879Winthrop
136601,849Madrid
136521,796Hermon
136251,551Colton
136301,443De Kalb Junction
136801,398Rensselaer Falls
136941,253Waddington
136351,244Edwards
129671,226North Lawrence
136841,172Russell
13681971Richville
13690773Star Lake
13687505South Colton
13664404Morristown
13670383Oswegatchie
13672376Parishville
13614345Brier Hill
13633318De Peyster
12927295Cranberry Lake
12965272Nicholville
13666216Newton Falls
13695200Wanakena
13696174West Stockholm
12973169Piercefield
13647150Hannawa Falls
13678105Raymondville
1368366Rooseveltown
1362351Chippewa Bay
1292237Childwold
1364937Helena
1363924Fine
13645Hailesboro
showing: 44 rows

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