Wendy's is an American international fast food restaurant chain founded by Dave Thomas on November 15, 1969, in Columbus, Ohio, United States. The company moved its headquarters to Dublin, Ohio, on January 29, 2006. As of March 1999, Wendy's was the world's third largest hamburger fast food chain with approximately 6,487 locations, following Burger King's 12,000+ locations and McDonald's' 31,000+ locations. On April 24, 2008, the company announced a merger with Triarc, the parent company of Arby's. Despite the new ownership, Wendy's headquarters remained in Dublin. Previously, Wendy's had rejected more than two buyout offers from Triarc Companies Inc. Following the merger, Triarc became known as Wendy's/Arby's Group (now The Wendy's Company), a publicly traded company.

Wendy is a given name generally given to females in English-speaking countries.