The Agana-Hagåtña Pillbox is a former Japanese defensive fortification in Hagåtña, Guam.

It is a six-sided reinforced concrete structure, located a short way above the high-tide line on the west side of the Paseo de Susana, a small peninsula jutting north from the village center.

The structure was built by Guam's Japanese defenders during their occupation of the island (1941–44) in World War II.

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