Vestal is a town within Broome County in the Southern Tier of New York, United States, and lies between the Susquehanna River and the Pennsylvania border. As of the 2020 census, the population was 29,110. Vestal is on the southern border of the county, and serves as a western suburb of the city of Binghamton. The town is home to the main cam…Vestal is a town within Broome County in the Southern Tier of New York, United States, and lies between the Susquehanna River and the Pennsylvania border. As of the 2020 census, the population was 29,110. Vestal is on the southern border of the county, and serves as a western suburb of the city of Binghamton. The town is home to the main campus of Binghamton University.