Adjuntas is a small mountainside municipality in Puerto Rico located central midwest of the island on the Cordillera Central, north of Yauco, Guayanilla and Peñuelas; southeast of Utuado; east of Lares and Yauco; and west of Ponce. Adjuntas is spread over 16 wards and Adjuntas Pueblo (the downtown area and the administrative center of the city). Adjuntas is about two hours by car westward from the capital, San Juan. It is the principal city of and comprises the Adjuntas Micropolitan Statistical Area.

Adjuntas is nicknamed “the Switzerland of Puerto Rico”, because of its relatively chilly weather.