38 may refer to:
*38 (number), the natural number following 37 and preceding 39
*one of the years 38 BC, AD 38, 1938, 2038
*.38, a caliber of firearms and cartridges
**.38 Special, a revolver cartridge
*''Thirty-Eight: The Hurricane That Transformed New England'', a 2016 book by Stephen Long
*"Thirty Eight", a song by Karma to Burn from the album ''Almost Heathen'', 2001
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