Mamudnagar Union (Bengali: মামুদনগর ইউনিয়ন) is a union of Nagarpur Upazila, Tangail District, Bangladesh. It is situated 2 kilometres (1.2 mi) east of Nagarpur and 26 kilometres (16 mi) south of Tangail city.

According to the 2011 Bangladesh census, Mamudnagar Union had 9,112 households and a population of 38,410. The literacy rate (age 7 and over) was 32.5% (male: 35.8%, female: 29.6%).

• Union Councils of Tangail District