The proprietors of this family-operated venue are a mother-and-son cosmetology duo, named Cathy and John. Together they operate the Super Salon, a Diamond City-based barbershop that offers the latest hairstyles from the Upper Stands. The salon serves the beauty needs of both travelers and residents of the city.
Located in the marketplace, the salon has a waiting area in the back, and a barber's chair and mirror beside the sink.
- John and Jessica's house key - On John and Cathy, opens the trapdoor to their home.
- Under the roof of the Super Salon, beside a couch, there is a trapdoor leading to John and Cathy's house.
- While the name of the salon starts with a K for "Kathy," the name of the character, "Cathy," starts with a C.
Kathy and John's Super Salon appears only in Fallout 4.