Alexander B. Williams (born October 29, 1815 Alexandria, then in the District of Columbia, now in Virginia) was an American merchant and politician from New York.
The family removed to Sodus, Wayne County, New York in 1825.
He was also a Justice of the Peace for two terms, and Supervisor of the Town of Sodus in 1845.
Afterwards he engaged in the real estate business, buying and selling land in Western New York.
This article about a member of the New York State Senate is a stub.