Delaware Propane, your locally owned and operated propane company. If you are looking for a propane company large enough to ensure reliability, comfort and safety - yet small enough to provide unparalleled service , you've come to the right place. Our goal is to be your number one choice for both residential and commercial propane gas service. We are a local company devoted to safety, customer satisfaction and quality service. We are conveniently located in Smyrna. Serving customers in New Castle, Kent, and Sussex County.