Americana, American Folk, The American Legends (Paul Bunyan, etc), regional food dishes, Appalachian and other regional cultures/traditions. Yes we aren’t as old as European nations and we are heavily influenced by the history of immigration.
Culture is shared beliefs, customs, practices, and social behavior of a particular group of people. Pop Culture is a sub section of culture. We have pop culture. We do not have a deep imbedded history of cultural culture.