Cayey is a mountain municipality in central Puerto Rico. Located on the Central Mountain range, north of Salinas and Guayama; south of Cidra and Caguas; east of Aibonito and Salinas; and west of San Lorenzo. Cayey is spread over 21 wards plus Cayey Pueblo, the downtown area and the administrative center of the city. It is part of the San Juan-Caguas-Guaynabo Metropolitan Statistical Area.

Cayey is notable for its surrounding mountains. The city has been actively growing since the 1990s, evidenced by its designation as a Metropolitan Area by the U.S. Census Bureau. It has experienced significant growth in commerce, and many major retailers, such as Wal-Mart have opened stores in the city. Industries in Cayey include sugar, tobacco and poultry. For tobacco there is a well-known company called Consolidated Cigar Corp.[1] A new coliseum and hospital facilities have also been built. Coca-Cola is a major corporation that has a manufacturing facility in the town. Cayey is also host to one of the campuses of the University of Puerto Rico, the University of Puerto Rico at Cayey.