Lelang Union () is a union parishad under Fatikchhari Upazila of Chittagong District in eastern Bangladesh.
Lelang Union has a total area of . It borders Kanchan Nagar Union to the north, Khiram Union to the east, Nanupur Union to the south, and Rangamatia Union to the west.
According to the 2011 Bangladesh census, Lelang Union had 4,962 households and a population of 25,078. Islam was the majority religion (83.7% of the population). Hindus were the second-largest religious community (16.1% of the population). 11.1% of the population was under the age of 5. The literacy rate (age 7 and over) was 51.4%, compared to the national average of 51.8%.
There are six villages in the union: Damdama, Fenua, Gopalghata, Lelang, Shahnagar, and Roypur.
There is one higher secondary school, Shahnagar Bohumukhi High School and College. There is one secondary school, Gopalghata High School.
The madrasa education system includes one dakil madrasa, Bonde Raza A Mohila Dakil Madrasha.