Top Cities to Celebrate National Hamburger Day: Los Angeles, Austin, and Wilmington.

In honor of National Hamburger Day, Yelp has released a list of the top 100 burgers in the US, with four burger joints in Los Angeles County making the list, including Father's Office, which was ranked fifth. Other LA County burger spots on the list include Monty's Good Burger, Real Food Daily, and In-N-Out. The best burger in America, according to Yelp, can be found at Fox Bros. Bar-B-Q in Atlanta.