Hermana Mayor

Hermana Mayor is an island in the Philippines under the jurisdiction of Santa Cruz in the province of Zambales. The island lies within the South China Sea.

Hermana Mayor has an approximate area of 5.39 square kilometers or 2.08 square miles, and roughly has a coastline length of 10.38 kilometers or 6.45 miles. The island is situated at approximately 15.7948, 119.7960. Elevation at these coordinates is estimated at 21 meters or 68.90 feet above mean sea level.


  1. Land area figures and coastline length were calculated from OpenStreetMap data.
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