| Official Name: | Agailjhara |
| Native Name: | আগৈলঝাড়া |
| Settlement Type: | Upazila |
| Coordinates: | 22°N 90°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Bangladesh |
| Subdivision Type1: | Division |
| Subdivision Type2: | District |
| Subdivision Name1: | Barisal Division |
| Subdivision Name2: | Barisal District |
| Leader Title: | Upazila Chairman |
| Leader Title1: | MP (Barisal-1) |
| Leader Name1: | Abul Hasanat Abdullah |
| Area Total Km2: | 161.82 |
| Population Total: | 149456 |
| Population As Of: | 2011 |
| Population Density Km2: | auto |
| Timezone: | BST |
| Utc Offset: | +6 |
Agailjhara (Bengali: আগৈলঝাড়া) is an upazila (sub-district) of southern Bangladesh's Barisal District, part of the Barisal Division.[1]
Agailjhara Upazila covers 155.47 km2. It is located between 22°54' and 23°03' north and between 90°03' and 90°13' east. It is bordered by Gournadi Upazila to the northeast, Wazirpur Upazila to the south, and Kotalipara Upazila of Gopalganj district to the west.
Agailjhara was formerly part of Gournadi Upazila. In the 16th century, the Faujdar of Bakla Sabi Khan settled in the village of Gaila with members of the Mughal Army. In 1921, a historic farmers convention was held in Agailjhara High English School presided by Khan Bahadur Hasem Ali Khan and advised by A. K. Fazlul Huq. During the Bangladesh Liberation War of 1971, 8 people were murdered in the village of Kodaldhoa. A thana (police station headquarters) was formed in Agailjhara on 16 June 1981. The status of Agailjhara Thana was upgraded to upazila (sub-district) on 7 November 1983 as part of the President of Bangladesh Hussain Muhammad Ershad's decentralisation programme.[1]
As of the 2011 Bangladesh census, Agailijhara upazila has a population of 149,456 living in 32,839 households. Agailijhara has an average literacy rate of 56.67% (7+ years) and a sex ratio of 1064 females per 1000 males. 10,857 (7.26%) of the population lives in urban areas.[2]
According to the 1991 Bangladesh census, Agailjhara had a population of 147,343 distributed among 30,560 households. 50.93% of the population was male, and 49.07% was female. There were 76,524 people aged 18 or over. Agailjhara had an average literacy rate of 42.4% (7+ years schooling), compared to the national average of 32.4%.
In the 2001 Bangladesh census, Agailjhara had a total population of 155,661 whereby males accounted for 50.23% (78,193) of the community, while 49.76% (77,468) were women.
Islam is the predominant religion with 82,720 people identifying as Muslims, 63175 as Hindus, 3553 as Christians and 8 people worshipping other faiths. Agailjhara Upazila has the highest percentage share of Hindus among the 10 upazilas of Barisal district but both the absolute numbers and the share of population has decreased since 1981.[2]
Agailjhara formed as a thana on 16 June 1981 and became an upazila on 7 November 1983.
Agailjhara Upazila is divided into five union parishads: Bagdha, Bakal, Gaila, Rajiher, and Ratanpur. The union parishads are subdivided into 78 mauzas and 96 villages.[3]
Agailjhara is home to many notable schools, including Shaheed Abdur Rob Serniabat Degree College, Askar Kalibari Secondary School and College (established in 1943), Goila High School (1893), and Agailjhara B. H. P. Academy (1919).
List of secondary schools in Agailjhara Upazila: