SV, Sv, sv, etc. may refer to:

• El Salvador, ISO 3166-1 country code SV
• South Vietnam, an extinct state
• Svalbard, Norway, FIPS country code SV
• Swedish language, ISO 639-1 language code sv
• Silicon Valley, a region in northern California noted for high tech and social media companies
• Spokane Valley, a valley in Washington state
• Spokane Valley, Washington a city in the United States
• sub verbo or sub voce, a Latin phrase, 'under the word/heading'

• Socialist Left Party (Norway), a political party
• Slovaks Forward (Slováci vpred), a political party in Serbia
• Supplementary vote, an electoral system

• Sievert, symbol Sv, a unit of ionizing radiation dose
• Starting variable, or initialization vector, in cryptography
• Stroke volume, in cardiovascular physiology
• .sv, a filename extension of SystemVerilog files
• .sv, the Internet country code top-level domain for El Salvador
• Svedberg unit, symbol S or Sv, a non-metric unit for sedimentation coefficient
• Sverdrup, symbol Sv, a non-SI unit of flow

• Save (baseball), abbreviated SV
• Sportverein ('sports club'), for example Hamburger SV
• Save percentage, SV%, a statistic in many sports

• Saudia, Saudi Arabian Airlines, IATA code SV
• Silver Line (Washington Metro)
• Società Veneta, an Italian public transport company

• MG XPower SV, a sports car by MG Rover
• Super veloce, a variety of Lamborghini car such as the Lamborghini Aventador SV, Lamborghini Murcielago SV, Lamborghini Diablo SV, or Lamborghini Miura SV
• S-V, a stage of the Saturn I rocket
• Name prefix of ships SV or S/V for sailing vessel

• ESP SV, a series of electric guitars
• Pokémon Scarlet and Violet, Pokémon video games released in 2022
• Shareholder value
• Significantly viewed out-of-market television stations in the United States, a classification for television stations
• Stattkus-Verzeichnis, a catalogue of the musical works of Claudio Monteverdi

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