Caigangan is a barangay of the philippine municipality Buenavista in the province Marinduque
which is part of the Luzon group
Caigangan is one of the barangays which are in the outlying area of Municipality Buenavista.
The municipality Buenavista with a population of about 21,018 and its 15 barangays belong to the partly urban areas in the Philippines. While some of the barangays developed modern urban structures, some others, especially those which are seated in the outlying areas, remained rural. By the end of 2007 Caigangan had 2,192 residents.
Other barangays of Buenavista are:
Bagacay, Bagtingon, Barangay I (Pob.), Barangay II (Pob.), Barangay III (Pob.), Barangay IV (Pob.), Bicas-bicas, Daykitin, Libas, Malbog, Sihi, Timbo (Sanggulong), Tungib-Lipata, Yook