Sai Noi is the northwesternmost district (amphoe

Amphoe

An amphoe is the second level administrative subdivision of Thailand. Usually translated as district, amphoe make up the provinces, and are analogous to a county seat...

) of Nonthaburi province

Nonthaburi Province

Nonthaburi is one of the central provinces of Thailand. Neighboring provinces are Phra Nakhon Si Ayutthaya, Pathum Thani, Bangkok and Nakhon Pathom....

, central Thailand

Thailand

Thailand , officially the Kingdom of Thailand , formerly known as Siam , is a country located at the centre of the Indochina peninsula and Southeast Asia. It is bordered to the north by Burma and Laos, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, and to the...

.

Geography

Neighboring districts are (from the north clockwise) Lat Bua Luang

Amphoe Lat Bua Luang

Lat Bua Luang is a district in the southern part of Ayutthaya Province, central Thailand.-History:Tambon Lat Bua Luang was separated from Amphoe Bang Sai and official upgraded to a district in 1947.-Geography:...

 (Ayutthaya Province

Ayutthaya Province

Phra Nakhon Si Ayutthaya is one of the central provinces of Thailand. Neighboring provinces are Ang Thong, Lop Buri, Saraburi, Pathum Thani, Nonthaburi, Nakhon Pathom and Suphan Buri....

) Lat Lum Kaeo

Amphoe Lat Lum Kaeo

Lat Lum Kaeo is the westernmost district of Pathum Thani Province, central Thailand.-Geography:Neighboring districts are Lat Bua Luang of Ayutthaya Province, Sam Khok and Mueang Pathum Thani of Pathum Thani Province, and Pak Kret, Bang Bua Thong and Sai Noi of Nonthaburi...

 (Pathum Thani Province), Bang Bua Thong

Amphoe Bang Bua Thong

Bang Bua Thong is a district of Nonthaburi Province, central Thailand.-Geography:Neighboring districts are Lat Lum Kaeo , Pak Kret, Mueang Nonthaburi, Sai Noi and Bang Yai.-Administration:...

, Bang Yai

Amphoe Bang Yai

Bang Yai is a district in the western part of Nonthaburi Province, central Thailand.-History:The district was created in 1917 as a minor district by splitting it from the district Bang Kruai and Bang Bua Thong. In 1921 it was elevated to full district status...

, and the districts Phutthamonthon

Amphoe Phutthamonthon

Phutthamonthon is a district in the east of Nakhon Pathom Province, central Thailand.-Geography:Neighboring districts are Bang Len, the districts Sai Noi, Bang Yai and Bang Kruai of Nonthaburi Province, the district Thawi Watthana of Bangkok, and Sam Phran and Nakhon Chai Si.-History:The minor...

 and
Bang Len

Amphoe Bang Len

Bang Len is a district in the northern part of Nakhon Pathom Province, central Thailand.-History:The district was created in 1896 under the name Bang Phai Nat . The district office was located in Ban Bang Phai Nat, Tambon Bang Sai Pa, on the east bank of the Tha Chin river...

 of Nakhon Pathom Province

Nakhon Pathom Province

Nakhon Pathom ) is one of the central provinces of Thailand. Neighboring provinces are Suphan Buri, Ayutthaya, Nonthaburi, Bangkok, Samut Sakhon, Ratchaburi and Kanchanaburi...

.

History

At first the area was administrated from Amphoe Bang Bua Thong. On January 1, 1948 four subdistricts were split off to from the new minor district (king amphoe) Sai Noi. On June 6, 1956 it was elevated to full district status.

In 1959 the Tambon Khun Si was transferred from Amphoe Bang Len (Nakhon Pathom) to become part of Sai Noi.

In 1979 the southern part of Tambon Rat Niyom formed the new Tambon Khlong Khwang. The following year the southern part of Tambon Sai Noi was split off to create Tambon Thawi Watthana.

Administration

The district is subdivided into 7 subdistricts (tambon

Tambon

Tambon is a local government unit in Thailand. Below district and province , they form the third administrative subdivision level. As of the 2009 there are 7255 tambon, not including the 169 khwaeng of Bangkok, which are set at the same administrative level, thus every district contains 8-10 tambon...

), which are further subdivided into 68 villages (muban

Muban

Muban is the lowest administrative subdivision of Thailand. Usually translated as village, they are the subdivision of tambon. As of 2008, there are 74944 administrative villages in Thailand. As of the 1990 census, the average village consisted of 144 households or 746 persons.A muban does not...

). Sai Noi itself has subdistrict municipality status (thesaban tambon) which covers parts of tambon Sai Noi and Khlong Khwang. There are further 7 Tambon administrative organizations (TAO).

No.	Name	Thai	Villages	Inh. Population A population is all the organisms that both belong to the same group or species and live in the same geographical area. The area that is used to define a sexual population is such that inter-breeding is possible between any pair within the area and more probable than cross-breeding with individuals...
1.	Sai Noi	ไทรน้อย	11	19,088
2.	Rat Niyom	ราษฎร์นิยม	8	6,223
3.	Nong Phrao Ngai	หนองเพรางาย	12	6,664
4.	Sai Yai	ไทรใหญ่	11	6,260
5.	Khun Si	ขุนศรี	8	4,740
6.	Khlong Khwang	คลองขวาง	10	5,413
7.	Thawi Watthana	ทวีวัฒนา	8	6,612

External links

• amphoe.com (Thai)