Belleville is a hamlet and census-designated place (CDP) in the town of Ellisburg, Jefferson County, New York, United States.

[4][5] Belleville is in southern Jefferson County, in the northern part of the town of Ellisburg.

The community sits on both sides of Sandy Creek, a southwesterly-flowing direct tributary of Lake Ontario.

New York State Route 289 leads south 3.5 miles (5.6 km) to the village of Ellisburg and northeast (upstream) 2 miles (3 km) to New York State Route 178.

According to the U.S. Census Bureau, the Belleville CDP has an area of 0.26 square miles (0.68 km2), all land.