This paper presents a novel conception of public integrity. It is not reducible to merely being the absence of corruption and applies to institutions rather than individuals. On this view, ‘public integrity’ is the evidenced disposition of an institution, through its constitutive parts, to legitimately cohere to its legitimate purpose, robustly across time and circumstance. This paper first, establishes its methodology; secondly, outlines four flaws common to current conceptions of integrity; thirdly, sets out five key components of the novel conception; and, finally, establishes its key advantages.