Koh Kret (locally known as เกาะเกร็ด) is a small island located in Chao Phraya River in the province of Nonthaburi, and is some 2 km long and 1 km wide. It has seven main villages, the largest and most populous being Ban Mon.
The island is served by ferries from the banks.
Ko Kret was created in 1722 by the digging of a canal to bypass a meander in the Chao Phraya.
Coordinates: 13°31′N 100°43′E / 13.517°N 100.717°E / 13.517; 100.717