Mirzapur Union () is a union of Gopalpur Upazila, Tangail District, Bangladesh. It is situated southeast of Gopalpur and north of Tangail, the district headquarters.
According to the 2011 Bangladesh census, Mirzapur Union had 7,103 households and a population of 27,359. The literacy rate (age 7 and over) was 42.8% (male: 44.6%, female: 41.2%).