Lak Si หลักสี่
Khet
MRT Pink Line skytrain runs above Chaeng Watthana Road in the Lak Si area
Khet location in Bangkok
Coordinates: 13°53′15″N 100°34′44″E / 13.88750°N 100.57889°E / 13.88750; 100.57889
Country	Thailand
Province	Bangkok
Seat	Thung Song Hong
Khwaeng	2
Khet established	21 November 1997
Area
• Total	22.841 km2 (8.819 sq mi)
Population  (2017)
• Total	104,701[1]
• Density	4,583.90/km2 (11,872.2/sq mi)
Time zone	UTC+7 (ICT)
Postal code	10210
Geocode	1041

Lak Si (Thai: หลักสี่, pronounced [làk sìː]) is one of the 50 districts (khet) of Bangkok, Thailand. It is bounded by (from the north clockwise): Don Mueang, Bang Khen and Chatuchak of Bangkok; Mueang Nonthaburi district and Pak Kret district of Nonthaburi province.

History

The name Lak Si means 'fourth milestone'. The community here was called Lak Si because it is at the fourth milestone of Khlong Prem Prachakon (คลองเปรมประชากร) (canal) dug during King Chulalongkorn's reign linking Bangkok to Bang Pa-in. Lak Si became a district on 21 November 1997, separating from Don Mueang District.

Administration

The district is divided into two sub-districts (khwaeng).

No.	Name	Thai	Area (km2)	Map
1.	Thung Song Hong	ทุ่งสองห้อง	16.886
2.	Talat Bang Khen	ตลาดบางเขน	5.955
Total			22.841