Ko Koet (Thai: เกาะเกิด, pronounced [kɔ̀ʔ kɤ̀ːt]) is an island in the Chao Phraya River in the area of Bang Pa-in district, southern part of Phra Nakhon Si Ayutthaya province, central Thailand.
Ko Koet was formed from the Chao Phraya River that flows through it and blowing the sediment to accumulate for a long time, until it formed an island in the middle of the river.
Hence the name Ko Koet, which means "formed island".
[1] Ko Koet is a tambon (sub-district) of Bang Pa-in district.
The tambon is administered by the Subdistrict Administrative Organization (SAO) Kho Koet (องค์การบริหารส่วนตำบลเกาะเกิด).