Cayey, officially Cayey de Muesas, is a mountain town and municipality in central Puerto Rico located on the Sierra de Cayey within 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 barrios plus Cayey Pueblo. It is part of the San Juan-Caguas-Guaynabo Metropolitan Statistical Area. Cayey is notable for its surrounding mountains.