DeKalb is a town in St. Lawrence County, New York, United States.

The town is named after American general Baron de Kalb, a German officer serving under George Washington.

In 1830, the Southeastern corner of DeKalb was made part of the Town of Hermon.

St. Regis and St. François Native Americans used to frequently visit the settlement on hunting expeditions.

New York State Route 812 intersects US-11 south of DeKalb village.

21.1% of all households were made up of individuals, and 8.2% had someone living alone who was 65 years of age or older.