OBX may refer to:
* OBX Index, the benchmark index of the Oslo Stock Exchange
* Outer Banks, a stretch of North Carolina coastline
* Outer Banks (TV series), ''Outer Banks'' (TV series), an action-adventure TV series set on the North Carolina coast
* Oberheim OB-X, a polyphonic analog synthesizer
* OBX, IATA airport code of Obo Airport (Papua New Guinea)
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