U.S. postal lookup

U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

42,735 verified records
All states and U.S. territories
Maps and coordinates
County directory

St. Lawrence County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in St. Lawrence County.

County State ZIP Code City Area Codes
St. Lawrence County NY 13690 Star Lake 315, 518, 680, 838
St. Lawrence County NY 13694 Waddington 315, 343, 613, 680, 753
St. Lawrence County NY 13695 Wanakena 315, 680
St. Lawrence County NY 13696 West Stockholm 315, 680
St. Lawrence County NY 13697 Winthrop 315, 680
St. Lawrence County NY 13699 Potsdam 315, 680
Page 5 of 5

Geographic Map of St. Lawrence County

Postal context

About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.