Khai Si () is a subdistrict (tambon) in Mueang Bueng Kan district, in Bueng Kan province, Isan (northeastern Thailand). As of 2022, it had a population of 5,466 people and has jurisdiction over ten villages. It lies on Highway 212 and the Mekong River and border with Laos, west of Bueng Kan and east of Ho Kham.
History The subdistrict was created in 1979, when nine administrative villages were split from Non Sawang subdistrict (then still named Nong Kheng) to form the new sub-district.
Administration Central government The administration of Khai Si subdistrict (tambon) is responsible for an area that covers 36,905 rai ~ and consists of ten administrative villages (muban).As of 2022: 5,466 people. Village English Thai People Moo1 Ban Tha Sa-ad บ้านท่าสะอาด 615 Moo2 Ban Don Yom บ้านดอนยม 626 Moo3 Ban A-hong บ้านอาฮง 583 Moo4 Ban Non Sila บ้านโนนศิลา 568 Moo5 Ban Khai Si บ้านไคสี 349 Moo6 Ban Siriphon บ้านศิริพร 628 Moo7 Ban Kham Muen บ้านคำหมื่น 616 Moo8 Ban Huai Seum Nuea บ้านห้วยเซือมเหนือ 472 Moo9 Ban Non Phaeng บ้านโนนแพง 406 Moo10 Ban Kham Saen บ้านคำแสน 603
Local government Khai Si subdistrict municipality () covers the whole Khai Si subdistrict.
Temple Khai Si subdistrict is home to the following active temples, where Theravada Buddhism is practised by local residents: Temple name Thai Location Wat Yod Kaew Thammakhun วัดยอดแก้วธรรมคุณ Moo1 Wat Phonchai Thammakhun วัดพรชัยธรรมคุณ Moo2 Wat A-hong Silawat วัดอาฮงศิลาวาส Moo3 Wat Sawang Kongkaram วัดสว่างคงคาราม Moo4 Wat Sumontharam วัดสุมณฑาราม Moo5 Wat Si Somboon วัดศรีสมบูรณ์ Moo6 Wat Thepmanee Si Amphon วัดเทพมณีศรีอัมพร Moo7 Wat Si Chom Chuen วัดศรีชมชี่น Moo8 Wat Ban Non Phaeng วัดบ้านโนนแพง Moo9 Wat Samakkheetham วัดสามัคคีธรรม Moo10
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