Gallup, Inc. is an American multinational analytics and advisory company based in Washington, D.C. Founded by George Gallup in 1935, the company became known for its public opinion polls conducted worldwide. Gallup provides analytics and management consulting to organizations globally. In addition the company offers educational consulting, the CliftonStrengths assessment and associated products, and business and management books published by its Gallup Press unit.

An opinion poll, often simply referred to as a survey or a poll, is a human research survey of public opinion from a particular sample. Opinion polls are usually designed to represent the opinions of a population by conducting a series of questions and then extrapolating generalities in ratio or within confidence intervals. A person who conducts polls is referred to as a pollster.