| Official Name: | Dighinala |
| Native Name: | দীঘিনালা |
| Settlement Type: | Upazila |
| Coordinates: | 23°N 92°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Bangladesh |
| Subdivision Type1: | Division |
| Subdivision Type2: | District |
| Subdivision Name1: | Chittagong |
| Subdivision Name2: | Khagrachhari |
| Leader Title: | Chairman |
| Leader Name: | Dharma Jyoti Chakma |
| Area Total Km2: | 694.11 |
| Population Total: | 103392 |
| Population As Of: | 2011 |
| Population Density Km2: | auto |
| Timezone: | BST |
| Utc Offset: | +6 |
Dighinala (Bengali: দীঘিনালা) is an upazila of Khagrachari District in the Division of Chittagong, Bangladesh.
Dighinala, the biggest upazila of Khagrachhari zila in respect of area, came into existence in 1916 as a thana and was upgraded to upazila in 1984. It is said that in the long past, Tripura Maharaja Govinda Manikya Bahadur Debbarma dug a big pond (meaning Dighi in Bangla) by the side of a canal (meaning Nala in Bangla). This upazila was under Tripura Kingdom used to known as "Reangdesh" [1]
It is generally believed that the upazila might have originated its name from above two words Dighi and Nala.[2]
Dighinala Upazila (Khagrachhari district) area 694.11 km2, located in between 23°04' and 23°44' north latitudes and in between 91°56' and 92°11' east longitudes. It is a hilly area. It is bounded by tripura state of India on the north, langadu upazila on the south, baghaichhari upazila on the east, Panchhari and Khagrachhari Sadar upazilas and Tripura state on the west. Golamoon, Karmi Mura, Lutiban, Kuradia hills are notable.
As of the 2011 Bangladesh census, Dighinala upazila had 22,464 households and a population of 103,392. 25,369 (24.54%) were under 10 years of age. Dighinala had an average literacy rate of 46.2%, compared to the national average of 51.8%, and a sex ratio of 949 females per 1000 males. 15,610 (15.10%) of the population lived in urban areas.[3] The ethnic population was 65,389 (63.24%), of which Chakma were 57,598 and Tripura 7,444.[4]
Dighinala Upazila is divided into five union parishads: Babuchhara, Boalkhali, Dighinala, Kabakhali, and Merung. The union parishads are subdivided into 20 mauzas and 245 villages.[5]
• Dharma Jyoti Chakma –– Upazila Chairman, Dighinala Upazila Parishad,Khagrachhari.
Main sources of income Agriculture 65.53%, non-agricultural labourer 8.51%, commerce 9.70%, service 5.01%, construction 0.42%, religious service 0.20%, rent and remittance 0.10% and others 10.53%.
Ownership of agricultural land Landowner 46.96%, landless 53.04%; agricultural landowner: urban 25.85% and rural 50.57%.
Literacy rate and educational institutions Average literacy 47.5%; male 56.1%, female 38%. Educational institutions: Choto Merung High School, DIGHINALA BORADOM HIGH SCHOOL,[6] Dighinala Government College, Dighinala Government High School, Dighinala Model Girls' School, Hashinpur High School, Anath Ashram Abashik High School, Babuchhara High School, Udal Bagan High School, Rasik Nagar Dakhil Madrasa.Trabonia high school
Communication facilities Pucca road 91 km, semi-pucca road 34 km, mud road 280 km.
Extinct or nearly extinct traditional transport Bullock cart. Connected to the zila headquarters by metalled roads. Bus, minibus, three wheelers ply over the upazila. Chander Gari (local four wheeled jeep) is a popular transport used to ply in the hill area of upazila.[7]