Adjuntas (ahd-HOON-tahs), is a small mountainside municipality in Puerto Rico located central midwest of the island on the Central Mountain range (La 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.

Adjuntas is nicknamed "the Switzerland of Puerto Rico", because of its relatively chilly weather. Many Puerto Rican mountain towns have colder weather than the rest of the island; Adjuntas is no exception: the average yearly weather is 72 degrees Fahrenheit. The cool weather attracts a good number of island tourists during the summer months. The town has a small hotel named Monte Rio and a good size parador, or country inn, called Villa Sotomayor. It also has the distinction of being the postal area with the lowest numerical ZIP code in the United States Postal Service (00601).