Nelliston is a village in Montgomery County, New York, United States.

The Village of Nelliston is in the Town of Palatine and is west of Amsterdam.

New York State Route 5 (Main Street) passes through Nelliston.

New York State Route 80 has its northern terminus at NY 5 in the village.

The racial makeup of the village was 97.75% White, 0.96% Native American, 0.16% Asian, and 1.13% from two or more races.

29.2% of all households were made up of individuals, and 14.8% had someone living alone who was 65 years of age or older.