Chatuchak (, ) is a khwaeng (subdistrict) of Chatuchak District, Bangkok, Thailand. It is a location of the district office.
The name Chatuchak after Chatuchak Park, a public park was built on the occasion of King Bhumibol Adulyadej (Rama IX)'s fourth cycle (48 years old) anniversary (Chatuchak means "fourth cycle"). In late 2003 it was officially declared a subdistrict along with four other subdistricts in Chatuchak.
Chatuchak is an area in the southwest of the district. It is bounded by (from the north clockwise): Lat Yao in its district (Ratchadaphisek Road is a borderline), Chomphon in its district (Phaholyothin Road is a borderline), Phaya Thai in Phaya Thai District (Khlong Bang Sue is a borderline), Bang Sue in Bang Sue District (Khlong Prapa and Southern Railway Line are the borderlines).