The flag of Galicia (; ), an autonomous community in northwestern Spain, consists of a white field intersected by a celestial blue diagonal band. The institutional flag incorporates the Galician coat of arms over the civil design.
Law 5/1984 of the Xunta de Galicia regulates its dimensions, establishing a proportion of 2:3 and setting the diagonal band's width to one-quarter of the flag's total height. Vexillological protocol dictates that citizens may use the civil flag, but public administrations must display the institutional version during official events.
The earliest vexillological symbols associated with Galicia rely on the chalice motif. The 13th-century English Segar's Roll depicts the arms of the King of Galicia as three golden chalices on a blue field. This constitutes canting arms, relying on the phonetic similarity between the Norman words calice and Galyce. The motif transitioned from a closed reliquary in 15th-century armorials to an open chalice with added crosses in the 16th century, visible in Albrecht Dürer's "Triumphal Arch of Maximilian" (1515).
By the 17th century, the Galician naval squadron utilized a white ensign displaying a golden chalice flanked by red crosses, following a 1647 decree by Philip IV. This standard appears in 18th-century Dutch and French maritime catalogs, including Petrus Schenk's 1711 Schouw-park aller Scheeps-Vlaggen and Denis Diderot's Encyclopédie.
Historical documentation also links the region to the Cross of Saint James. The Santa Irmandade mobilized under the red Banner of Santiago during the 15th-century Irmandiño wars. Emigrant military units, including the Tercio de Gallegos during the 1806 defense of Buenos Aires, utilized a white standard bearing the regional arms on the obverse and the Cross of Saint James on the reverse. According to historian Manuel MurguÃÂa, the Batallón Literario deployed a plain white flag during the 1808 Peninsular War.
The exact causality of the current diagonal blue band remains a subject of historiographical debate, divided between a maritime origin and an intellectual creation during the Rexurdimento.
The maritime narrative links the design to the province of A Coruña. In September 1845, this maritime province adopted a blue saltire on a white field. The Imperial Russian Navy formally protested this design due to its identical appearance to the Russian naval jack. A Spanish government decree on June 22, 1891, removed one arm of the saltire to resolve the diplomatic dispute, resulting in a single diagonal band. According to this theory, Galician emigrants departing from the port of A Coruña adopted this naval flag as the regional standard upon reaching the Americas.
An alternative origin places the creation of the flag directly within Galician intellectual circles. Documentation shows the white and blue diagonal flag was publicly displayed in Galicia by the Sociedade Económica de Amigos do PaÃÂs during the transfer of RosalÃÂa de Castro's remains between May 25 and 27, 1891. Because this event predates the naval decree modifying the A Coruña flag by nearly a month, historians attribute the specific design to Manuel MurguÃÂa. Emigrant organizations subsequently institutionalized the symbol; the Centro Gallego de La Habana paraded with the current flag on November 15, 1892.
The Primo de Rivera and Francoist regimes legally and practically suppressed the flag, forcing its use into clandestine political and cultural circles. Small manufactured items bearing the colors, such as ashtrays, were routinely confiscated by authorities. Public display of the symbol led to judicial consequences; in 1971, the Tribunal de Orden Público sentenced a protestor in Vigo to over two years in prison for illegal propaganda after carrying the flag.
Following the Spanish transition to democracy, the Statute of Autonomy of Galicia recognized the flag in 1981. The Real Academia Galega standardized the modern iteration of the coat of arms in 1972, which the Xunta de Galicia officially integrated into the institutional flag through the Symbols Law of May 29, 1984.
The official chromatic values of the flag are codified by the Galician government. The central band utilizes a specific celestial blue, while the coat of arms incorporates dark blue, red and gold.
A variety of historical standards and maritime ensigns have represented the Kingdom of Galicia and its subsequent political entities prior to the standardization of the modern flag.