Marinduque is a small island province in the MIMAROPA region, lying in the Sibuyan Sea between the Bondoc Peninsula of Quezon and Romblon. It is frequently described as heart-shaped — an outline visible on the map that the province has embraced as an identity marker. With only six municipalities and no cities, Marinduque is one of the least populous provinces in Luzon. It is best known for the Moriones Festival, a Holy Week ritual unique in the Philippines.
Marinduque's roughly heart-shaped coastline has become central to its tourism identity. The province markets itself as the 'Heart of the Philippines,' and the shape appears on provincial seals, promotional materials, and local souvenirs. The resemblance is approximate but recognizable on a map.
The island's interior is hilly, with no major river systems and limited flat agricultural land. Coconut, rice, and root crops are the main produce. Fishing supplements the diet of coastal communities. The population is small enough that nearly everyone is connected by family or community ties within a few degrees.
Boac, the capital, sits on the western coast and is the main town. The Boac Cathedral, built by Augustinian missionaries in the 17th century, dominates the town center and serves as the spiritual focus of the island's Holy Week observances.