DeKalb Junction is a hamlet and census-designated place located in the town of DeKalb in Saint Lawrence County, New York, United States.

[1] DeKalb Junction has a post office with ZIP code 13630.

According to the U.S. Census Bureau, the community has an area of 3.945 square miles (10.22 km2); 3.883 square miles (10.06 km2) of its area is land, and 0.062 square miles (0.16 km2) is water.

[1] The census-designated place is in the Hermon-DeKalb Central School District.

This article about a location in St. Lawrence County, New York is a stub.