The fast food franchise with the most worldwide locations is Subway, with over 40,000 restaurants in more than 100 countries.
Subway is a fast food restaurant chain that specializes in made-to-order sandwiches and salads. It was founded in 1965 in Connecticut, USA, and has since grown to become one of the largest fast food chains in the world. Subway operates on a franchise business model, with individual restaurant owners operating under the Subway brand and following the company's guidelines and standards. The chain has a strong international presence, with locations in countries such as the United States, Canada, the United Kingdom, China, and India.