The City University of New York is the public university system of New York City. It is the largest urban university system in the United States, comprising 25 campuses: eleven senior colleges, seven community colleges, and seven professional institutions. In 1960, John R. Everett became the first chancellor of the Municipal College System of New York City, later known as the City University of New York (CUNY). CUNY, established by New York State legislation in 1961 and signed into law by Governor Nelson Rockefeller, was an amalgamation of existing institutions and a new graduate school.

A university system is a set of multiple affiliated universities and colleges that are usually geographically distributed. Typically, all member universities in a university system share a common component among all of their various names. Usually, all member universities of a university system are governed by a system-wide governing body, such as a board of trustees or a board of regents. In the United States, many states have one or two state university systems under which many of their publicly funded universities are aligned, both in name and in governance. Additionally, for-profit universities, such as DeVry University, often have multiple campuses which share the same name; these may be, but are not always, described as a university system.