[4] According to the 2011 Census of Bangladesh, Nilphamari Sadar Upazila had 97,088 households and a population of 435,162.

Nilphamari Sadar had a literacy rate (age 7 and over) of 45.73%, compared to the national average of 51.8%, and a sex ratio of 986 females per 1000 males.

[9] Nilphamari Sadar Upazila is divided into Nilphamari Municipality and 15 union parishads: Chaora Bargachaup, Chaprasarnjami, Charaikhola, Gorgram, Itakhola, Kachukata, Khoksabari, Kundapukur, Lakshmichap, Palasbari, Ramnagar, Songalsi, Sonaray, and Tupamari.

[6] At present, Nilphamari Municipality has an area of 27.50 sqkm and is subdivided into 15 wards.

The processing of increasing the area of Nilphamari Municipality is ongoing.