Om Noi (, ) officially the City of Om Noi (, ) is a municipality in Samut Sakhon, Thailand. It is located 13 km west from Bangkok. The city was established in 2010.
Om Noi was upgraded to subdistrict municipality (thesaban tambon) on 1 May 1994. Later to town municipality (thesaban mueang) on 21 September 2002. Finally on 27 December 2010 to city municipality (thesaban nakhon).
Neighbouring subdistricts are (from the west clockwise): Om Yai, Rai Khing and Krathum Lom of Sam Phran district, Nakhon Pathom province; Nong Khang Phlu of Nong Khaem district, Bangkok; Suan Luang and Tha Mai of Krathum Baen district, Samut Sakhon province.<br> The main watercourse of Samut Sakhon province, Tha Chin River flows into the Gulf of Thailand at Bang Ya Phraek subdistrict.
The administration of Om Noi subdistrict (tambon) is responsible for an area that covers and consists of thirteen villages (muban), as of December 2024: 53,9148 people and 51,913 households.
As of December 2024 there is Om Noi city municipality (thesaban nakhon), which covers the whole subdistrict.<br> There are 28 communities (chumchon) in Om Noi, although not directly chosen by the local citizens, which provides advice and recommendations to the local administrative organization.
There are in the subdistrict: Mahachai 2 Hospital with 200 beds and Vichaivaj International Hospital Om Noi with 196 beds.
There is one health-promoting hospital in the subdistrict (Moo10).
There are four primary schools:
There is one secondary school:
There is one vocational school:
The following active temples, where Theravada Buddhism is practised by local residents:
Because it is situated in Bangkok Metropolitan Region, making Om Noi easily accessible by three mainroads: Highway 4, Phutthamonthon Sai 4 Road (Highway 3310) and Phutthamonthon Sai 5 Road (Highway 3414).<br> The area is served by several bus lines of the Bangkok Mass Transit Authority (BMTA).