YK Burger is a family owned hamburger restaurant at 219 Jones St, San Francisco, CA 94102, in the Tenderloin neighborhood, a short walk from Union Square and Market Street. It serves burgers, chicken sandwiches,  loaded fries, seafood items, and sides. YK Burger is a casual neighborhood spot focused on smash burgers and comfort food, with a broader menu than a typical burger restaurant thanks to its chicken, beef, lamb burgers and seafood offerings.