38

38 may refer to:
 * 38 (number), the natural number following 37 and preceding 39
 * 38 BC
 * AD 38
 * 1938
 * 2038

Science

 * Strontium, an alkaline earth metal in the periodic table
 * 38 Leda, an asteroid in the asteroid belt

Other uses

 * .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