Gibraltarians (Spanish: gibraltareños, colloquially: llanitos) are a sub-national group who live in Gibraltar, a British overseas territory situated near the southern tip of the Iberian Peninsula, close to Spain, at the entrance to the Mediterranean Sea. Gibraltarians hold British citizenship.

Some Gibraltarians are an ethnic and cultural mixture of the many immigrants who came to the Rock of Gibraltar over 300 years. Following its capture from Spain by an Anglo-Dutch force in 1704, all but 70 of the existing inhabitants of Gibraltar elected to leave with many settling nearby. Since then, immigrants from the United Kingdom, Spain, Italy, Malta, Portugal, Morocco, Menorca, and India have settled at Gibraltar, as have Sephardic Jews from North Africa.

Genoese and Catalans (who arrived in the fleet with Prince George of Hesse-Darmstadt) became the core of Gibraltar's first civilian population under Habsburg Gibraltar. Sephardi Jews from Tetouan in Morocco, who had previously been suppliers to English Tangier, began supplying fresh produce to Gibraltar in 1704. Most Gibraltarian surnames are of Mediterranean or British extraction. The exact breakdown (including non-Gibraltarian British residents) of family names according to the electoral register according to the 1995 Census was as follows:

Jews in Gibraltar by 1755 together with the Genoese in Gibraltar formed 50% of the civilian population (then 1,300). In 1888 construction of the new harbour at Gibraltar began to provide an additional coaling station on the British routes to the East. This resulted in the importation of Maltese labour both to assist in its construction, and to replace striking Genoese labour in the old coaling lighter-based industry. Maltese and Portuguese people formed the majority of this new population.

Other groups include Menorcans (due to the links between both British possessions during the 18th century; immigration began in that century and continued even after Menorca was returned to Spain in 1802 by the Treaty of Amiens), Sardinians, Sicilians and other Italians, French, and British people.

Immigration from Spain (including refugees from the Spanish Civil War) and intermarriage with Spaniards from the surrounding Spanish towns was a constant feature of Gibraltar's history until General Francisco Franco closed the border with Gibraltar, cutting off many Gibraltarians from their relatives on the Spanish side of the border. The Spanish government reopened the land border, but other restrictions remain in place.

For the period of World War II the border was closed, although Spain was nominally neutral, as Franco's regime was effectively allied with Nazi Germany.^{[citation needed]}

Research by Fiorenzo Toso in 2000 about the names of Gibraltarian families of Genoese origins found that most of the emigration from the Italian region Liguria was from the areas of Genoa and Savona, and some surnames such as Caruana, often believed to be Maltese, originate from Sicilians who emigrated to Malta during the Italian Renaissance).