With such a significant presence in the state of Washington, many may know that the Boeing 737, as well as many other well-known aircraft types, are born at the Renton Factory. Home to a large production facility, Boeing has been producing its best-selling single-aisle aircraft at the site for decades. In fact, the 737 family is known as the most-produced commercial aircraft in aviation history. However, it would not be possible without 1.1 million square feet of factory space.