The Ultimate Cheeseburger is a signature cheeseburger sold at Jack in the Box.
It consists of two beef patties with American and Swiss-style cheeses, ketchup, mustard, and Mayo-Onion sauce on a sesame seed bun.
In 2008, the burger was added to the Phoood Hall of Fame.
- Bacon Ultimate Cheeseburger - Adds three slices of bacon.
- BBQ Ultimate Cheeseburger (discontinued) - Adds BBQ sauce and grilled onions.
- Jalapeño Ranch Ultimate Cheeseburger (discontinued) - Adds creamy sauce and sliced jalapeños.
- Triple Ultimate Cheeseburger (discontinued) - Added a third beef patty. 
- ↑ Jack In The Box | Ultimate Cheeseburger™
- ↑ The Jack in the Box Rant. Black Viper.
- ↑ Ultimate Cheeseburger: RUINED. The Straight Dope.
- ↑ Phoood Hall of Fame: Jack in the Box Ultimate Cheeseburger
- ↑ Fast Food's Most Decadent Burger Arrives at Jack in the Box Restaurants. Junk Food News.
- ↑ Products and Promotions Facts. Jack in the Box Inc.