The Flag of Birgu, Malta is the official emblem representing the town of Birgu, one of the three fortified cities on the Grand Harbour of Malta. It consists of a green field with the Saint Peter's Church, Birgu's most prominent landmark, displayed in white. A red castle symbolizing Fort St. Angelo is positioned at the hoist (upper left corner of the flag). The flag represents the town's rich historical significance as a major military stronghold throughout history, particularly during the Order of Saint John and the Knights of Malta periods. The design reflects Birgu's identity as a coastal town with significant religious and defensive structures.