Debidwar (Bengali: দেবিদ্বার) is an upazila of Comilla District in the Division of Chittagong, Bangladesh.

According to the 2011 Census of Bangladesh, Debidwar Upazila had 82,695 households and a population of 431,352.

Debidwar has a literacy rate (age 7 and over) of 52.83%, compared to the national average of 51.8%, and a sex ratio of 1112 females per 1000 males.

[6][7] Debidwar Upazila is divided into Debidwar Municipality and 15 union parishads: Barkamta, Boroshalghor, Dakshin Gunaighor, Dhamti, Elahabad, Fatehabad, Jafargonj, Mohanpur, Rajameher, Rasulpur, Subil, Sultanpur, Uttar Gunaighor, Vani, and Yousufpur.

The union parishads are subdivided into 129 mauzas and 192 villages.