Langadu () is an upazila of Rangamati District in the Division of Chittagong, Bangladesh.
Langadu is located at . It has a total area of 388.49 km<sup>2</sup>.
According to the 2022 Bangladeshi census, Langadu Upazila had 20,823 households and a population of 90,408. 12.20% of the population were under 5 years of age. Langadu had a literacy rate (age 7 and over) of 70.63%: 74.71% for males and 66.43% for females, and a sex ratio of 103.03 males for every 100 females. 20,656 (22.85%) lived in urban areas.
ð© Muslim majority ð¨ Buddhist majority
As of the 2022 Bangladeshi census, Langadu upazila had a population of 90,408. The ethnic population was 21,248 (23.50%), of which Chakma were 20,888.
ð© Bengali majority ð¨ Chakma majority
UNO: Mohammad Saiful Islam.
Langadu Upazila is divided into seven union parishads: Atarakchara, Bogachattar, Gulshakhali, Kalapakujja, Langadu, Maeinimukh, and Vasannadam. The union parishads are subdivided into 25 mauzas and 138 villages.
There are two colleges in the upazila: Langadu Government Model College and Gulshkhali Border Guard Model College.
According to Banglapedia, Gulshakhali Adarsha High School, Kattali High School, Langadu Girls' High School, Langadu Government High School, and Rabita Model High School are notable secondary schools.