Phloi Waen (, ) is a tambon (subdistrict) of Tha Mai district, Chanthaburi province.

History Phloi Waen (), this name used to be a district called Phloi Waen district. It was named after a hill with a Buddhist temple on top, Khao Phloi Waen. The hill got this name because it was the first ruby mine in Chanthaburi. According to the survey, lots of rubies and sapphires were found around the hill's area. That was where the famous rubies of Chanthaburi started, and continues to the present.

Later, in 1917 the district office was moved to Tha Mai's area, the district name was changed to be same as the central subdistrict since then.

Geography Phloi Waen is located in the northern part of the district, covering an area of approximately 10.50 km2 and approximately from the district centre, with approximately from the downtown Chanthaburi.

Administration The area is under the administration of Khao Wua-Phloi Waen Subdistrict Municipality in conjunction with the neighbouring, Khao Wua.

It is also consists of seven administrative mubans (villages).

No. Name Thai1.Ban Pong Rakบ้านโป่งรัก2.Ban Rai Sungบ้านไร่สูง3.Ban Cham Kho Bonบ้านชำฆ้อบน4.Ban Huai Rakamบ้านห้วยระกำ5.Ban Sa Kaeoบ้านสระแก้ว6.Ban Cham Kho Langบ้านชำฆ้อล่าง7.Ban Na Bon Noenบ้านนาบนเนิน

Population It has a total population of 1,721 (846 men, 875 women) in 828 households.

References