Kathalia () is an upazila of Jhalokati District in the Division of Barisal, Bangladesh. Geography Kathalia is located at . It has 23,904 households and a total area of 152.08 km2.Bhandaria upazila of Pirojpur district to the north, Bamna upazila of Barguna district and Mathbaria upazila of Pirojpur to the south, Bishkhali river to the east and Bhandaria upazila and Mathbaria upazila of Pirojpur district to the west of Kathalia. The main river of this upazila is Bishkhali. Numerous canals originating from the Bishkhali river— flowing on the eastern side of the upazila— are spread like a net in this area. Most of the lands of this upazila are low lying which is flooded by the tide of Bishkhali river. Notable bill is Chhonauta. Rivers The notable rivers of Kathalia Upazila are: Bishkhali River The main river of this area is Bishkhali River.It is the contunution of Padma's tributary river named Ichamoti River. Padma divided into two flows at about 52 km. far from Goalundo Ghat. One of them took the name Ichamoti and by flowing over Faridpur and Madaripur District it falls on Tetulia River at the north–south area of Barishal.It takes the name Kirtonkhola at 5 km. north from Barishal; at Nalchity Upazila it is named Nalchity River. At the point of entering into Jhalakathi Sadar it named Bishkhali.The total length of the river is 96 km. The average width of the river from its origin to first 30 km is about 1 km and the rest is about 2 km. The average depth is about 16m. The river is fully influenced by tide and ebb. Water is collected at Betna, Bamna, Barguna and Patharghata stations to examine the salinity status of the river. It shows erosional tendency and the towns and ports, e.g. Betagi, Amua, Bamna are under threat to its erosion. Bangladesh water development board (BWDB) has constructed an embankment to prevent flood and salinity. Deposition process and char (island) formation is active at various parts of the river. Some of the chars are under settlement and cultivation. The Badankhalikone and Khakdone, two of the offshoots of the Bishkhali are about to die due to lack of sufficient flow. Jhalokati, Betagi, Kathalia, Bamna, Barguna, Patharghata, Phuljhuri are some important places on the north bank of the river. Sugondha River History Naming It is said that during the British rule, the market of national fruit of Bangladesh