Scotty's Castle furnishings reflect the distinct personalities of Albert and Bessie Johnson and Death Valley Scotty. The Johnsons were accustomed to a privileged lifestyle. Their vacation home reflected the luxuries they had always enjoyed. Vintage cars indicate the Johnsons' effortless mobility in a time when travel was a luxury. While many of Bessie's possessions reveal her love of the finer things in life, her sober, religious side is also expressed in objects found in their home.

Although the furnishings and objects reveal the Johnsons' background, Scotty left his mark throughout the Castle as well. Many items, including two "shotsplitters," plates with curved edges, and a garbage can disguised as a well enhanced Scotty's famous stories. Perhaps even Albert's impressive gun collection was amassed with Scotty's tales of desert showdowns in mind. The furnishings, like the structure itself, were "Spanish Provincial" as Bessie called them, gathered from the Mediterranean. They ranged from handcrafted vernacular to opulent.

The home was influenced by nostalgia for the Old West and the romanticism of Spanish Colonial Revival style, or what Bessie called "Spanish Provincial." It did not lack the extravagance of the Johnsons' Chicago lifestyle.