SV, Sv or sv may stand for:

• El Salvador (ISO country code, SV)
• Swedish language (ISO 639 alpha-2, sv) from Swedish Svenska
• Sievert (Sv), SI derived unit of radiation dose
• Sosialistisk Venstreparti, a political party from Norway
• Der Verein für Deutsche Schäferhunde, The German Shepherd Dog Club of Germany
• Smallville, An abbreviation for Smallville the TV series.
• the IATA code for Saudi Arabian Airlines