| Official Name: | Baghaichhari |
| Native Name: | বাঘাইছড়ি |
| Settlement Type: | Upazila |
| Subdivision Type: | Country |
| Subdivision Name: |  Bangladesh |
| Subdivision Type1: | Division |
| Subdivision Name1: | Chittagong |
| Subdivision Type2: | District |
| Subdivision Name2: | Rangamati |
| Population Total: | 96899 |
| Population As Of: | 2011 |
| Population Density Km2: | auto |
| Area Total Km2: | 1931.25 |
| Timezone: | BST |
| Utc Offset: | +6 |
| Coordinates: | 23°N 92°W |
Baghaichhari (Bengali: বাঘাইছড়ি) is an upazila of Rangamati District in the division of Chittagong, Bangladesh.
Baghaichhari is located at 23.15°N 92.1917°W. It has a total area of 1931.25 km2. It is bordered by Khagrachhari district to the west, the Indian state of Tripura to the north, Mizoram (India) to the east and Barkal and Langadu upazilas to the south.
As of the 2011 Bangladeshi census, Baghaichhari upazila had 20,171 households and a population of 96,899. 24,183 (24.96%) were under 10 years of age. Baghaichhari had an average literacy rate of 41.9%, compared to the national average of 51.8%, and a sex ratio of 915 females per 1000 males. 19,875 (20.51%) of the population lived in urban areas.[1] The minority ethnic population was 72,837 (75.17%), of which Chakma were 67,279.[2]
Baghaichhari Upazila is divided into Baghaichari Municipality and eight union parishads: Amtali, Baghaichari, Bongoltali, Khedarmara, Marisha, Rupokari, Sajek, and Sharoyatali. The union parishads are subdivided into 19 mauzas and 303 villages.[3]
Baghaichhari Municipality is subdivided into 9 wards and 14 mahallas.[1]