Bang Khun Si Subdistrict

Bang Khun Si () is a "khwaeng" (subdistrict) of Bangkok Noi District, in Bangkok, Thailand. In 2019, it had a total population of 31,689 people.
Naming.
The name is derived from a canal that runs through the west area, Khlong Bang Khun Si, also known as Khlong Chak Phra.
Geography.
Bang Khun Si covers the central-southwest area of Bangkok Noi, with a total area of 4.360 km2 (1.683 mi2), regarded as the largest subdistrict of Bangkok Noi.
The area is bordered by neighbouring subdistricts (from north clockwise): Bang Khun Non in its district (Southern Railway Line is boderline), Siri Rat and Ban Chang Lo in its district (Charan Sanit Wong Road is a borderline), Wat Tha Phra in Bangkok Yai District (Khlong Mon is a borderline), Khuha Sawan in Phasi Charoen District (Khlong Bang Chueak Nang is a borderline), Khlong Chak Phra in Taling Chan District (Khlong Chak Phra is a borderline), respectively.