Landai Sin River

{{Use dmy dates|date=November 2019}}

{{Infobox river

| name = Landai Sin River

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| map = Bachgal.png

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| subdivision_type1 = Country

| subdivision_name1 = Afghanistan

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| subdivision_type3 = Province

| subdivision_name3 = Nuristan

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| mouth = Kunar River

| mouth_location = Barikot, Kamdesh, Afghanistan

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| progression =

| river_system = Kunar River → Kabul River → Indus River

| basin_size = ~{{cvt|3000|km2}}

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The Landai Sin River ({{langx|ps|لنډی سين}} Lanḍai Sīn, "Short River"), also called the Bashgal River ({{lang|ps|باشګال سيند}}), is located in eastern Afghanistan. It rises in the Hindu Kush range near the Mandol Pass in the Nuristan Province of Afghanistan, and is fed from glaciers and snow to its north. The Landai Sin is a tributary of Kunar River.{{cite book |last=Adamec |first=Ludwig W. |date=2012 |author-link=Ludwig W. Adamec |title=Historical Dictionary of Afghanistan |url=https://books.google.com/books?id=AAHna6aqtX4C |publisher=Scarecrow Press |page=84 |isbn=9780810878150 |access-date=29 January 2015}}

The Landai Sin Valley is inhabited by the Kata, Mumo (Madugal), Kashtan, and Kom tribes of the Nuristani people. Eastern Kata-vari is the main spoken language in the Landai Sin Valley. The main town on the river is Kamdesh.