Banshtail Union () is a union parishad of Mirzapur Upazila, Tangail District, Bangladesh. It is situated 17 km east of Mirzapur and 46 km east of Tangail, The district headquarters.
According to the 2011 Bangladesh census, Banshtail Union had 6,897 households and a population of 29,781.
The literacy rate of Banshtail Union is 58.3% (Male-61.6%, Female-55.4%).