'Influence' is a term that refers to the ability to indirectly control or affect the actions of other people or things. The meaning of influence therefore depends on who or what is being affected, and to what end. It may also refer to:
★ , an episode of ''Law & Order: Special Victims Unit''
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Influence machine, a type of mechanical device that produces static electricity
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Social influence, in interpersonal relationships
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Minority influence, when the minority effect the behavior or beliefs of the majority
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Sphere of influence, the area a state has a level of control over
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Office of Strategic Influence, a short-lived United States government department
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Driving under the influence, the criminal act of driving while intoxicated
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Undue influence, a contract law term arising from parties with unequal bargaining power