To speak of institutions is usually to invoke an idea of brick-and-mortar establishments, and the organizations that inhabit and sustain them. However, an institution is as much an idea as it is a thing: the institutionalization of a musical genre is, above all else, the formalization of a narrative about the genre, and of the value system that the narrative embodies. The present chapter touches upon three instances of the institutionalization of jazz in the United States since the Second World War, including the Institute of Jazz Studies, housed at Rutgers University in New Jersey; the SF Jazz Center in San Francisco; and the Institute of Jazz and Gender Justice at the Berklee College of Music. I seek here to discern what their supporting narratives can tell us about shifting conceptions of jazz institutionalism, and its reflection of broader ideas about the music’s role in American and global musical culture.