West Sand Lake is a hamlet and census-designated place in Rensselaer County, New York, United States. The population was 2,616 people in 2020. The community is located in the northwestern corner of the town of Sand Lake.

Rensselaer County is a county in the U.S. state of New York. As of the 2020 census, the population was 161,130. Its county seat is Troy. The county is named in honor of the family of Kiliaen van Rensselaer, the original Dutch owner of the land in the area. The county is part of the Capital District region of the state.