SH or sh may stand for:

• sh (letter) , the 27th letter of the Albanian alphabet
• Saint Helena Island
• Schaffhausen, canton of Switzerland
• Schleswig-Holstein, Germany
• sh, the Bourne shell or UNIX shell
• SuperH (microprocessor)
• sh (quiet!) - 'sh' [S] as an interjection
• abbreviation for Sonatrach, the State Oil Company of Algeria
• sinh hyperbolic sinus, mathematical function
• In English, "sh" in a word stands for a voiceless postalveolar fricative consonant [], perhaps without exception.