Chiang Rak Noi (Thai: เชียงรากน้อย, pronounced [tɕʰīaŋ raːk̚˥ nɔ́ːj]) is a tambon (subdistrict) in Sam Khok district, upper part of Pathum Thani province.

Chiang Rak Noi was originally administered by the local government in the form of a Council Subistrict.

Most of the area is lowland, Chiang Rak Noi lies on the Chao Phraya eastern bank, and has many khlongs (canals) flowing through it.

[1] The seal of SAO Chiang Rak Noi features an elephant stands on two lotus flowers in a circle frame.

[1] Like many tambons in Sam Khok district, the original ethnic group of Chiang Rak Noi is the Mon.