Logos as a visual cue can help firms communicate their unique identities and capture consumers' attention. Despite the importance and prevalent use of logos, the logo literature remains fragmented. Hence, this article attempts to provide an overarching research framework based on an extensive and comprehensive review of the existing logo literature. Specifically, we review 124 studies published in business journals over the past 30 years, and classify them into six major research topics: 1) theoretical foundations, 2) logo design/redesign, 3) basic logo elements, 4) additional logo elements, 5) outcomes of logo use, and 6) practical applications of logo use. Finally, we suggest future research directions for academics and provide practitioners with guidelines that help manage logos for their businesses.