Sig

Sig used as a name may refer to:
 * Sig (given name)
 * Sig, Algeria, a city on the Sig River
 * Sig Alert, an alert for traffic congestion in California, US
 * Sig, Denmark, a village in West Jutland, Denmark
 * Sig River or Mekerra, Algeria
 * Sig (tanker)

sig (lower case) may refer to:
 * sig (rune), an Armanen rune used as the Nazi SS symbol
 * sig, sign language hand actions; see movement (sign language)
 * .sig, a signature block in e-mail

sig as a loanword may refer to:
 * Sig. (Italian), abbreviation of Signore
 * Sig., patient instructions in a medical prescription

SIG (capitalized) may refer to: Sig as an abbreviation may refer to:
 * Fernando Luis Ribas Dominicci Airport San Juan, Puerto Rico, IATA code
 * SIG (band), a Finnish band
 * SIG Group, a Swiss packaging company and former railway vehicle and firearms manufacturer
 * SIG plc, UK, formerly Sheffield Insulations Group plc
 * SIG Sauer, the brand name used by firearms manufacturers and sister companies SIG Sauer AG from Switzerland, SIG Sauer Inc. of the United States and SIG Sauer GmbH of Germany
 * S.I.G., call sign in the 1960s UK TV series Captain Scarlet and the Mysterons
 * 15 cm sIG 33 (Schweres Infanterie Geschütz), German WWII gun
 * Signal (IPC), which all have names beginning with SIG


 * Significant figures, a digit of a number within its measurement resolution; often abbreviated as "sig figs"
 * "Sig", an abbreviation of the Greek letter Sigma, especially in the name of a fraternity or sorority

SIG as an acronym may refer to:
 * Särskilda Inhämtningsgruppen, Swedish special forces unit 2007–2011
 * Semen Indonesia Group, a cement company
 * Shanghai International Group, financial group
 * Special Interest Group, a general term
 * Examples include: Aviation SIG, Bluetooth SIG, Small Form Factor SIG
 * Special Interrogation Group, UK WWII unit
 * Special Investigation Group, New Zealand
 * Strasbourg IG (Strasbourg Illkirch-Graffenstaden Basket), a French basketball club
 * Susquehanna International Group, a trading firm