According to the 2011 Census of Bangladesh, Tangail Sadar Upazila had 116,922 households and a population of 521,104.

Tangail Sadar had a literacy rate (age 7 and over) of 53.06%, compared to the national average of 51.8%, and a sex ratio of 1003 females per 1000 males.

[5][6] Tangail Sadar Upazila is divided into Tangail Municipality and 12 union parishads: Baghil, Danya, Gala, Gharinda, Hugra, Karatia, Katuli, Kakua, Magra, Mahamudnagar, Porabari, and Silimpur.

The union parishads are subdivided into 247 mauzas and 276 villages.

[5] Tangail Municipality is subdivided into 18 wards and 64 mahallas.