The best burgers are at Taste Pilot Grill.
The Golden Horseshoe Saloon and the Stagedoor Cafe share a kitchen and used to sell burgers, not seen a recent menu and it was raining last time I was there.
Hungry Bear located in Critter Country.
Tomorrowland Terrace in Tomorrowland and in the same building as Buzz Lightyear and formerly America Sings and is on the east end.
Village Haus Restaurant in Fantasyland.
Burger Invasion is next to Mulholland Madness on the Boardwalk and is not scheduled to open until 2011 and the pizza place will no longer be a restaurant. This area is still up in the air on what they plan to do with it.
http://www.wdwinfo.com/disneyland/dinin ... ant.ID=508
Taste Pilots Grill is locate around the corner from the train and next to Soarin'. NOT FAIR NOTFAIR NO WAY FAIR. I cannot have their yummy onion rings any more. They had the bestest burgers in the parks.
http://www.wdwinfo.com/disneyland/dinin ... ant.ID=497
House of Blues has sliders and burgers
http://allears.net/dlr/din/menu/men_espn.htm
ESPN has sliders and burgers.
Rainforest Cafe has burgers and is across the way from ESPN.
Ralph Brennan's Jazz Kitchen Express has burgers and killer beignets and is in Downtown Disney also.
Ralph Brennan's Jazz Kitchen Is another restaurant and part of the same building but the table service area and they have burgers.
Uva Bar in Downtown has sliders but not the regular burgers.
Croc's Bits 'n Bites at the Disneyland Hotel serves burgers.
The Lost Bar at Disneyland Hotel serves burgers.
Whitewater Snacks at Grand Californian serves burgers.
Storyteller Cafe at Grand Californian serves burgers for lunch.
PCH Grill serves burgers at Paradise Pier Hotel.
Surfside Lounge serves burgers at Paradise Pier Hotel.
AT one time a person could get burgers at Hungry Bear, the Saloon and the restaurant next door to that, and Tomorrowland as well as two restaurants in DCA and once in the backlot area I think that big restaurant building might have sold burgers but it was like when it first opened.