Map - Feni District (Feni)

Feni is a district located in southeastern Bangladesh. It was a part of the Greater Noakhali, Comilla, Chittagong and Tripura. , the district's estimated population stood at 1,437,371, making it the ninth-most populous district in Chittagong Division. The administrative hub of the district is in Feni City, which also serves as the headquarters of Feni Sadar Upazila in the central section of the district. The original name of the district was Shamshernagar, which served as a mahakuma under the district of Noakhali (greater part), Comilla (few part) and Chittagong District (at rest) until 6 December 1984. It is the 64th Number Districts of Bangladesh. The district consists of six sub-districts: Sonagazi, Fulgazi, Parshuram, Daganbhuiyan, Chhagalnaiya and Feni Sadar.

In the opinion of most historians, the area of this district is more ancient than the other areas of the greater Noakhali region. Many archaeological antiquities were found in this district which proves the claim. In ancient times, maximum area of the Noakhali region was under water except this area.

Before 1984, it was a mahakuma of Noakhali district. In 1872–74, Amirgaon thana which was established by the Mughals was facing river erosion. Then it was moved to Khaiarat which was situated by the river Feni. Then this area was known as Feni because of the river. It was established as a mahakuma with three thanas named Mirsarai, Chhagalnaiya and Amirgaon in 1875. Later, Mirsarai was included in Chittagong District. In 1976, a new mahakuma was established and the Khaiarat thana was moved to this new mahakuma and the mahakuma was named Feni. The first headquarter of the mahakuma was in Amirgaon thana. It was moved to Feni in 1881. During the administrative reconstruction in 1984, all the mahakumas were upgraded to districts and Feni became one of them.