Oran (Arabic: وَهران, romanized: Wahrān) is a major coastal city located in the northwest of Algeria. It is considered the second most important city of Algeria, after the capital, Algiers, because of its population and commercial, industrial and cultural importance. It is 432 km (268 mi) west-southwest from Algiers. The total population of the city was 803,329 in 2008, while the metropolitan area has a population of approximately 1,500,000, making it the second-largest city in Algeria.

The word Wahran comes from the Berber expression wa - iharan (place of lions). A locally popular legend tells that in the period around AD 900, there were sightings of Barbary lions in the area. The last two lions were killed on a mountain near Oran, and it became known as la montagne des lions ("The Mountain of Lions"). Two giant lion statues stand in front of Oran's city hall, symbolizing the city.

During the Roman Empire, a small settlement called Unica Colonia existed in the area of the current Oran, but this settlement disappeared as the Maghreb was conquered by a succession of regional powers, beginning with the Vandals in 435, followed by the Berbers of the Mauro-Roman Kingdom, and finally the Arabs around the start of the 8th century.

Present-day Oran was founded in 903 by the Azdadja [fr] and Ajissa Berbers of the Maghrawa confederation who lived in the area. The city enjoyed a period of prosperity under the Almohad Caliph Abd al-Mu'min for a lengthy period of time when he built thirty vessels to connect it with Andalusia. It endured a long, prosperous reign under the zayyanid of Tlemcen and used its ports as a key outlet to Spain in particular. It was captured by the Castilians under Cardinal Cisneros in 1509, and Spanish sovereignty lasted until 1708 when the city was conquered by the Algerians during the Siege of Oran (1707–1708). Spain recaptured the city in 1732. However, its value as a trading post had decreased greatly, so during the reign of King Charles IV the city was recaptured in 1790–1792 by a coalition of Algerian troops against Spain which resulted in victory for the bey of Oran despite the many attempts in 1563. The beylik lasted until 1831 when the city fell to the French.

Under French rule during the 19th and 20th centuries, Oran was the capital of the Département of Oran (number 92). In July 1940, the British navy shelled French warships in the port after they refused a British ultimatum to surrender; this action was taken to ensure the fleet would not fall into German hands, as the Nazis had defeated France and occupied Paris. The action increased the hatred of the Vichy regime for Britain but convinced the world that the British would fight alone against Nazi Germany and its allies. The Vichy government held Oran during World War II until its capture by the Allies in late 1942, during Operation Torch.

Also, during French rule, Jews were encouraged to modernize and take on jobs they had not before, including agriculture, while Muslims were forced out of the city and their ancestral fertile lands were confiscated and given to Colons. Jews in the city were allowed to join the French Army starting 24 October 1870, while Muslims were forced to do military service. Algerian Jews were granted citizenship while Algerian Muslims were not. Jews would soon be targeted after the war for not supporting the struggle for independence against France.

Before the Algerian War of 1954–1962, Oran had one of the highest proportions of Europeans of any city in North Africa. In July 1962, after a ceasefire and accords with France, the FLN entered Oran and were shot at by Europeans. A mob attacked pied-noir neighborhoods in response to the incident and during the subsequent Oran massacre of 1962 at least 95 and as many as 365 were killed; many others are reported to have "disappeared". This triggered a larger exodus of Europeans to France, which was already underway. In 1962, most of the Europeans and Algerian Jews living in Oran were repatriated to France..

With its location as the closest port to Spain and its prominence on the Mediterranean, Jewish refugees first immigrated to Oran to flee persecution and conversion to Christianity in Spain in 1391. This refuge brought other religious refugees that included both Jews again and Muslims in both 1492 and 1502.