Nawabganj upazila on the north, the padma river and Sadarpur upazila on the south, Sreenagar and Nawabganj upazilas on the east, Harirampur and Char Bhadrasan upazilas and the Padma river on the west.

Dohar thana, now an upazila, was established in 1926. The upazila consists of one municipality, six wards, 8 union parishads, 78 mouzas and 139 villages.

Dohar Upazila is located in Dhaka District. Upazilla(s)/Thana(s) in Dhaka are Badda Thana, Cantonment Thana, Demra Thana, Dhamrai Upazila, Dhanmondi Thana, Dohar Upazila, Gulshan Thana, Hazaribagh Thana, Kafrul Thana, Kamrangir Char Thana, Keraniganj Upazila, Khilgaon Thana, Kotwali Thana, Lalbagh Thana, Mirpur Thana, Mohammadpur Thana, Motijheel Thana, Nawabganj Upazila, Pallabi Thana, Ramna Thana, Sabujbagh Thana, Savar Upazila, Shyampur Thana, Sutrapur Thana, Tejgaon Thana, Uttara Thana.