Institutions are essentially temporal, in the sense that, definitionally, they endure. Setting aside the conventional understanding of a historical institutionalism, we focus on the interplay of institutions and temporality. The chapter begins with a conception of time that is complex and social, and identifies four concepts amenable to deeper exploration: duration, tempo, and “temporal location,” which itself involves distinct notions of sequencing and timing. Institutions shape and are shaped by all of these aspects of temporality. The chapter surveys a range of institution-theoretic analyses, combining them in myriad ways via more complex notions such as the power of the institutional status quo, institutional intercurrence, punctuated equilibrium, critical junctures, and path dependence. While temporal approaches offer limited leverage on institutional origins, they show great strength in accounting for dynamic persistence and change, especially insofar as they supply means of understanding the layering and corresponding multiplicity of institutions of distinct temporal profiles operating at any given moment in social life.