Wat Yom Mon is a vanished temple formerly located off the city island in the eastern area in present Hua Ro sub-district.
The monastery was situated south of Wat Nang Chi, in the immediate vicinity of Wat Yom Thai. The latter was located on the premises of the present Wat Tham Niyom.
Wat Yom Thai and Wat Yom Mon were situated about 100 meters from each other following a Fine Arts Department excavation map drafted in 2005. Wat Yom Thai stood south of Wat Yom Mon, identical as indicated on the mid-19th century map.
Some remains of the temple were excavated by the Fine Arts Department (FAD) in Geo Coord: +14° 21' 40.42" N, +100° 34' 54.31" E.
Historical data about the monastery and its construction are unknown.
The mid-19th century map indicates the existence of a chedi on its eastern side.