Sadarpur () is an upazila of Faridpur District in the Division of Dhaka, Bangladesh.
Sadarpur is located at and has 40,219 households and a total area of 261.29 km<sup>2</sup>.
According to the 2022 Bangladeshi census, Sadarpur Upazila had 49,860 households and a population of 201,511. 9.72% of the population were under 5 years of age. Sadarpur had a literacy rate (age 7 and over) of 68.95%: 69.58% for males and 68.40% for females, and a sex ratio of 88.89 males for every 100 females. 18,201 (9.03%) lived in urban areas.
As of the 2011 Census of Bangladesh, Sadarpur upazila had 40,219 households and a population of 186,254. 46,229 (24.82%) were under 10 years of age. Sadarpur had an average literacy rate of 43.18%, compared to the national average of 51.8%, and a sex ratio of 1077 females per 1000 males. 6,076 (3.26%) of the population lived in urban areas.
Sadarpur Upazila is divided into nine union parishads: Akter Char, Bhashanchar, Char Bishnupur, Char Manair, Char Nasirpur, Dheukhali, Krishnapur, Narikelbaria, and Sadarpur. The union parishads are subdivided into 88 mauzas and 328 villages.
The postal code is 7820.