{{Infobox settlement <!--See the Table at Infobox Settlement for all fields and descriptions of usage--> <!-- Basic info ----------------> |official_name = Khlong Ton Sai |native_name = คลองต้นไทร |settlement_type = [[Khwaeng]] | coordinates = {{coord|13|43|19.7|N|100|30|31.8|E|display=title}} |motto = | image_map = {{#property:P242}} | map_caption = Location in [[Khlong San District]] <!-- Location ------------------> |subdivision_type = Country |subdivision_name ={{flag|Thailand}} |subdivision_type2 = [[Provinces of Thailand|Province]] |subdivision_name2 = [[Bangkok]] |subdivision_type3 = [[Amphoe|Khet]] |subdivision_name3 = [[Khlong San District|Khlong San]] <!-- Politics -----------------> |established_title = |established_date = <!-- Area ---------------------> |area_total_km2 = 1.773 |area_footnotes = <ref>{{cite web |url=https://webportal.bangkok.go.th/upload/user/00000130/BMA_STATISTICS%202563/ebook%2063.pdf|script-title=th:สถิติกรุงเทพมหานครประจำปี 2563|trans-title=Bangkok Statistics 2020|author=Administrative Strategy Division, Strategy and Evaluation Department, Bangkok Metropolitan Administration |date=2021 |access-date=27 November 2021|lang=th}}</ref> |area_water_km2 = <!-- Population -----------------------> |population_as_of = 2020 |population_footnotes = |population_note = |population_total = 18,704 |population_density_km2 = <!-- General information ---------------> |timezone = [[Indochina Time|ICT]] |utc_offset = +7 |elevation_footnotes = |elevation_m = <!-- Area/postal codes & others --------> |postal_code_type = Postal code |postal_code = {{#property:P281}} |area_code = |blank_name = [[TIS 1099]] |blank_info = {{#property:P1067}} |website =

|footnotes = |image_skyline= Khlong Ton Sai, Khlong San, Bangkok 10600, Thailand - panoramio (5).jpg |caption =Khlong Ton Sai (left) as seen from the midstream of the Chao Phraya }} '''Khlong Ton Sai''' ({{langx|th|คลองต้นไทร}}, {{IPA|th|kʰlɔ̄ːŋ tôn sāj|pron}}) is a ''[[khwaeng]]'' (subdistrict) of [[Khlong San District]], in [[Bangkok]], [[Thailand]]. In 2020, it had a total population of 18,704 people.<ref>{{cite web|url=https://stat.bora.dopa.go.th/stat/statnew/statyear/#/TableTemplate4/Area/statpop?yymm=63&ccDesc=%E0%B8%81%E0%B8%A3%E0%B8%B8%E0%B8%87%E0%B9%80%E0%B8%97%E0%B8%9E%E0%B8%A1%E0%B8%AB%E0%B8%B2%E0%B8%99%E0%B8%84%E0%B8%A3&topic=statpop&ccNo=10&rcodeNo=1018&rcodeDesc=%E0%B9%80%E0%B8%82%E0%B8%95%E0%B8%84%E0%B8%A5%E0%B8%AD%E0%B8%87%E0%B8%AA%E0%B8%B2%E0%B8%99|publisher=Department of Provincial Administration|title=Population statistics 2020|language=Thai|accessdate=12 October 2021}}</ref>

==History & toponymy== The name of the subdistrict, called after the natural ''[[khlong]]'' (canal) that run through the lower part of area, "Khlong Ton Sai". Its name means "Canal of [[Ficus|Fig]]s" because there were many trees of this type growing along the waterways in the past.

In the era before 1957, Khlong Ton Sai was a clear and clean watercourse and was a thoroughfare for people to travel around. It was a path connects the [[Chao Phraya River]] with Khlong Bang Sai Kai in the neighbouring [[Khet Thon Buri|Thon Buri area]]. Currently, the canal is shallow, has polluted water, and is shorter in distance than in the past.

==References== {{reflist}}

[[Category:Subdistricts of Bangkok]] [[Category:Khlong San district]]

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