| Official Name: | Badalgachhi |
| Settlement Type: | Upazila |
| Coordinates: | 24.9667°N 142°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Bangladesh |
| Subdivision Type1: | Division |
| Subdivision Type2: | District |
| Subdivision Name1: | Rajshahi |
| Subdivision Name2: | Naogaon |
| Area Total Km2: | 213.97 |
| Population Total: | 201342 |
| Population As Of: | 2011 |
| Population Density Km2: | auto |
| Timezone: | BST |
| Utc Offset: | +6 |
Badalgacchi (Bengali: বদলগাছি) is a Upazila of Naogaon District under Rajshahi Division, Bangladesh.[1]
Badalgacchi is located at 24.9667°N 142°W. It consists of 54,001 households and has a total area of .
According to the 2011 Bangladesh census, Badalgachhi Upazila had 54,001 households and a population of 201,342. 36,957 (18.36%) were under 10 years of age. Badalgachhi had a literacy rate (age 7 and over) of 49.55%, compared to the national average of 51.8%, and a sex ratio of 1002 females per 1000 males. 6,357 (3.16%) lived in urban areas.[2] Ethnic population was 10,799 (5.36%), of which Oraon were 3,661.[3]
In 1991, the population of Badalgacchia was 176,010. Males constitute 51.34% of the population, and females account for 48.66%. Badalgachi has an average literacy rate of 28.4% for persons seven years and older, which is below the national average of 32.4%.
Somapura Mahavihara is situated in Paharpur village.
Badalgachhi, foemed as a Thana in 1807, was converted into an upazila in 1983.[4]
The Upazila is divided into eight union parishads: Adhaipur, Badalgachhi, Balubhara, Bilasbari, Kola, Mathurapur, Mithapur, and Paharpur. The union parishads are subdivided into 247 mauzas and 238 villages.[2]