Semangka Bay

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{{Infobox body of water

| name = Semangka Bay

| native_name ={{native name|id|Teluk Semangka}}

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| location = Southeast Asia

| pushpin_map = Indonesia Sumatra

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| coordinates = {{coord|5|36|00|S|104|42|00|E|region:ID_type:waterbody|display =inline,title}}

| type = Bay

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| basin_countries = Indonesia

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| website =

| reference = [https://geographic.org/geographic_names/name.php?uni=-3738560&fid=2533&c=indonesia Teluk Semangka: Indonesia] National Geospatial-Intelligence Agency, Bethesda, MD, USA

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Semangka Bay ({{langx|id|Teluk Semangka}}) is a large bay located on the southern tip of Sumatra Island. At the southern tip of Sumatra there are two large bays, Teluk Semangka is located in the western part.

On the east side of the bay stretches Tanggamus Regency, with the capital city of Kotaagung located at the northern end of the bay.