Flag of Gibraltar

This rectangular banner features two horizontal bands of white and red, where the white upper section is twice the height of the red lower section. Positioned in the center of the white field is a red three-towered stone castle, which has a golden key suspended from its front gate over the red band.

The red castle serves as a representation of the Fortress of Gibraltar, emphasizing the territory's historical status as a fortified stronghold. Attached to the castle's gate, the golden key symbolizes Gibraltar's strategic importance as the gateway between the Atlantic Ocean and the Mediterranean Sea. The selection of red and white reflects the heraldic colors assigned during the Spanish period, collectively signifying the strength and security of the peninsula. These elements together commemorate the territory’s long-standing reputation as an impregnable naval and military post.

The current design was officially adopted on November 8, 1982, though its origins trace back to a royal warrant issued by Queen Isabella I of Castile on July 10, 1502. Before this formal adoption, the territory primarily displayed the British Blue Ensign with a circular badge depicting the fortress. The 1982 proclamation standardized the banner's proportions to 1:2, ensuring its use for both land and sea purposes as a symbol of the British Overseas Territory. This transition marked a shift from using purely colonial maritime flags to a unique territorial banner.