Ang Sila (, ) is a tambon (subdistrict) of Phibun Mangsahan District, in Ubon Ratchathani province, Thailand. In 2025, it had a population of 5,408 people.
Ang Sila originated as a rural settlement in the area of the Mun River basin. The early population consisted mainly of IsanâÂÂLao people who migrated from nearby areas within present-day Ubon Ratchathani Province and established villages in lowland areas. It was later organized as a tambon under Phibun Mangsahan District during administrative reforms during the mid-20th century.
The tambon is divided into seven administrative villages (mubans).