Raozan Upazila () is an upazila of Chattogram District, in Chattogram Division, Bangladesh. It was established in August,1947.
Raozan has 63,375 households and a total area of 246.58 km<sup>2</sup>.
The two main rivers are Karnaphuli and Halda.
Raozan is surrounded by Fatikchhari Upazila on the north, Boalkhali Upazila and Karnafuli river on the south, Rangunia and Kawkhali (Rangamati) Upazilas on the east, and Hathazari and Fatikchhari Upazila on the west.
The river Karnaphuli flows on the south side of the Raozan Upazila and the Halda river flows on the west side.
According to the 2022 Bangladeshi census, Raozan Upazila had 88,071 households and a population of 396,358. 10.14% of the population were under 5 years of age. Raozan had a literacy rate (age 7 and over) of 84.87%: 86.40% for males and 83.50% for females, and a sex ratio of 91.78 males for every 100 females. 118,775 (29.97%) lived in urban areas.
According to the 1991 Bangladesh census, during that time Raozan had a population of 274,344 people. Males constituted 50.58% of the population, while females constituted about 49.42% of the population. The average literacy rate is 52.5% (7+ years), above the national average of 32.4%.
The Raozan Upazila is divided into Raozan Municipality and 14 union parishads which are Bagoan, Binajuri, Chikdair, Dabua, Gahira, Haladia, Kadalpur, Noajispur, Noapara, Pahartali, Paschim Guzara, Purba Guzara, Raozan, and Urkirchar. The union parishads are subdivided into 64 mauzas and 66 villages.
Raozan Municipality is subdivided into 9 wards and 17 mahallas.
Raozan has two health complexes and some private hospitals.
The upazila has three universities, three graduate colleges, three higher secondary colleges, four schools and colleges, two Kamil madrasha, four Fazil madrasha, four alim madrasha, 12 Dakhil madrasha, five MPo Dakhil madrasha, 48 student secondary schools, three girls' secondary schools, nine lower secondary schools, and 177 government primary schools, community schools, and kindergartens.