Big John Steak & Onion
Type	private
Industry	Full-Service Restaurants
Founded	1963/1973
Founder(s)	John E. Klobucar
Headquarters	Owosso, Michigan, USA
Number of locations	16
Area served	Mid-Michigan
Key people	Sharee Bitterman
Products	submarine sandwiches
Parent	Jlj Chicken Limited Inc.
Website	Big Johns Steak & Onion.net

Big John Steak & Onion, a division of Jlj Chicken Limited Inc., is a regional sub sandwich chain. The name came from a nickname that the founder, John E. Klobucar, had received from his friends. The chain is consider a restaurant icon of the Flint Area.

John E. Klobucar opened the first Kentucky Fried Chicken in 1963 Flint, Michigan, the first outside of the Detroit area. A decade later in 1973, Klobucar started Big John Steak and Onion, the first restaurant to serve submarine sandwiches to the Flint Area. Klobucar later opened a KFC in Owosso, but sold the Flint location. The restaurant grew into a chain of 15 stores across Mid-Michigan.