Dog n Suds is a midwestern United States chain of root beer and hot dog drive-in style eateries with the once popular and now rare form of in-car "carhop" delivery service. The chain was created in Champaign, Illinois, by school teachers James Griggs and Don Hamacher. Licensing rights are now owned by TK&C's LLC of Lafayette, Indiana. They were very common throughout the 1950s and 1960s and at one time had about 850 restaurants. Griggs sold his interest in the business in the early 1970s. As of November 2011, seventeen locations remain open.

Dog n Suds serves many different food items, but mainly serves hot dogs. The "Dog" in Dog n Suds represents the Coney Island hot dog-style chili con carne over hot dog or chili dog served there, while the "Suds" represent its super-sweet original formula homemade root beer, which is served in frosted glass mugs and claimed to be "The World's Creamiest Root Beer." Dog n Suds root beer can also be found in some vending machines throughout the midwest.

Another favorite from the classic Dog n Suds menu is the Texas Burger. This burger is made using two burger patties, 1½ buns (One top, one middle, and one bottom), a slice of cheese on the top burger, lettuce and the Dog n Suds secret sauce on the middle bun, and Coney sauce on the bottom bun.