SIG Sauer may refer to:
- SIG Sauer, a brand of firearms.
- SIG Sauer GmbH & Co. KG, the original German firearms company formed in 1976.
- SIG Sauer, Inc. the American firearms company founded in 1985.
- SIG Sauer AG, the Swiss firearms company formerly known as Swiss Arms.
- SIG Combibloc Group, commonly known as SIG.
- J. P. Sauer & Sohn, commonly known as Sauer.
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