consists of 5 unions and 67 mouzas.

Unions

* Gopalpur Union
* Kazibakai Union
* Baligram Union
* Dasar Union
* Nabagram Union

Geography

The geographical location of Dasar Upazila is . Its total area is 76.08 km². Dasar upazila is bounded on the north by Madaripur Sadar upazila, on the south by Agailjhara Upazila, on the east by Kalkini upazila