The Sumgait pogrom ("Sumgait massacres") was a pogrom that targeted the Armenian population of the seaside town of Sumgait in the Azerbaijan Soviet Socialist Republic in late February 1988. 

The pogrom took place during the early stages of the Karabakh movement. On February 27, 1988, mobs of ethnic Azerbaijanis formed into groups and attacked and killed Armenians on the streets and in their apartments; widespread looting and a general lack of concern from police officers allowed the violence to continue for three days.

On February 28, a small contingent of Ministry of Internal Affairs (MVD) troops entered the city and unsuccessfully attempted to quell the rioting. More professional military units entered with tanks and armored personnel vehicles one day later. Government forces imposed a state of martial law and curfew and brought the crisis to an end. The official death toll released by the Prosecutor General of the USSR (tallies were compiled based on lists of named victims) was 32 people (26 Armenians and 6 Azerbaijanis), although other estimates reach up into the hundreds of victims.

The violence in Sumgait was unexpected and was widely covered in the Western press. It was greeted with general astonishment in Armenia and the rest of the Soviet Union since ethnic feuds in the country had been largely suppressed by the government, which had promoted policies such as proletarian internationalism, fraternity of peoples, and socialist patriotism to avert such conflicts. The massacre, together with the Nagorno-Karabakh conflict, presented a major challenge to the reforms being implemented by Soviet leader Mikhail Gorbachev. Gorbachev was later criticized for his perceived slowness in reacting to the crisis.

Because of the scale of atrocities against the Armenians as an ethnic group the pogrom was immediately linked to the Armenian genocide of 1915 in the Armenian national consciousness.A number of international and Soviet sources also describes the events as genocide of the Armenian population. The Sumgait pogrom is commemorated every year on February 28 in Armenia, Nagorno-Karabakh, and among the Armenian diaspora.

The city of Sumgait is located near the coast of the Caspian Sea, only thirty kilometers north of the capital Baku. It had been renovated in the 1960s and had become a leading industrial city, second after Baku by its industrial importance, with oil refineries and petrochemical plants built during that era. Its population in the 1960s stood at 60,000, but by the late 1980s it had swollen to over 223,000 (with an Armenian population of about 17,000), and overcrowding among other social problems plagued the city. While there was a high rate of unemployment and poverty among the Azerbaijani residents, the Armenians comprised mainly the working and educated sector of the town's population.

The political and economic reforms that General Secretary Gorbachev had initiated in 1985 saw a marked decentralization of Soviet authority. Armenians, in both Armenia proper and Nagorno-Karabakh, viewed Gorbachev's reform program as an opportunity to unite the two entities together. On February 20, 1988, tens of thousands of Armenians gathered to demonstrate in Stepanakert's Lenin (now Renaissance) Square to demand that the region be joined to Armenia. On the same day, the Supreme Soviet of Nagorno-Karabakh voted to join the Armenian SSR, a move staunchly opposed by the Soviet Azerbaijani authorities. Gorbachev rejected these claims, invoking Article 78 of the Soviet Constitution, which stated that republics' borders could not be altered without their prior consent. The vote by the Council and the subsequent protests were condemned also by the state-run Soviet media; however, they resonated more loudly among Azerbaijanis. As journalist Thomas de Waal wrote in his 2003 book on the conflict, after the appeal of the Council "the slow descent into armed conflict began on the first day."

The rallies in Armenia were countered by demonstrations in Baku, during which time strong anti-Armenian sentiments were voiced by citizens and officials alike. One such statement came on February 14, 1988, when the head of the department of Central Committee of the Communist Party of Azerbaijan Asadov, declared "a hundred thousand Azerbaijanis are ready to storm Karabakh at any time and organize a slaughter there." In the days leading up to the massacre, a leader of the Communist Party of Azerbaijan, Hidayat Orujov, warned Armenians in Sumgait: "If you do not stop campaigning for the unification of Nagorno Karabakh with Armenia, if you don't sober up, 100,000 Azeris from neighboring districts will break into your houses, torch your apartments, rape your women, and kill your children.". This was later denied by Orujov himself who in his interview stated that not only he had never publicly made any statements aimed at igniting inter-ethnic conflict, but also he was not present in Sumgait and was not holding any political role at the time.

On February 26, several minor rallies were held at Lenin Square in Sumgait. Explicit calls for violence against Armenians and for their expulsion from Azerbaijan were heard and the crowds were agitated by news of Azerbaijani refugees who had fled Armenia (from the towns Kapan and Masis). Certain individuals told stories of murders and violence purportedly carried out by Armenians against the Azerbaijanis. Soviet authorities would later cast these individuals as agents provocateur. One individual, according to the Soviet press, was later revealed not to be a resident of Kapan, as he had claimed, but a criminal with a prior arrest record. Zardusht Alizadeh, who was active in the social and political life of Azerbaijan from 1988–1989 and was one of the founders of Azerbaijani Popular Front, visited Sumgait ten days after the pogrom and met with the workers from the aluminum factory, and reported that locals said that people from out of town had been inciting the violence. Baku's local Party leader Fuad Musayev, who was called back to Baku because of the unrest, stated in the interview given to Thomas de Waal, "Someone was provoking them, propaganda work was going on."

The demonstrations in the Lenin Square were concluded with strong anti-Armenian sentiments. During the demonstrations there were apparent threats and accusations against the Armenians for distorting the territorial integrity of Azerbaijan. The Armenians were also blamed for being much better-off than most of the Azerbaijanis in Sumgait. Slogans such as "Death to Armenians!" and "Armenians get out of our city" were being voiced. There were also many public figures attending the rallies, among them the head of public school No: 25, an actress of the Arablinski theatre, Azerbaijani poet Khydyr Alovlu (a strong supporter of Heydar Aliyev) and others, who called for Armenians to be expelled from Azerbaijan or killed. Almost each speech was concluded with the slogan "Death to Armenians!". Since the speakers used microphones these calls were heard not only in the square but also in the nearby streets.

Efforts to calm the crowd were made by Azerbaijani figures such as secretary of the city party committee Bayramova and poet Bakhtiyar Vahabzadeh, who addressed the crowd atop a platform. V. Huseinov, the director of the Institute of Political Education in Azerbaijan, also attempted to calm them by assuring them that Karabakh would remain within the republic and that the refugees stories were false. He in turn was heckled with insults and forced to step down. Jahangir Muslimzade, Sumgait's first secretary, spoke to the crowd, and told them to allow Armenians to leave of their own accord. But according to witnesses, this message served to agitate the crowd. Shortly after his speech, at around 6:30 pm, Muslimzade was handed a flag of the Azerbaijan SSR and soon found himself leading the crowd. According to Muslimzade, he was attempting to lead the crowd away from the Armenian district and toward the sea, but many Armenians saw this act as implicating him as a leader of the riot. The crowd, in any case, dispersed and several groups made for the Armenian district.

The pogrom of the Armenian population of Sumgait started on the evening of February 27, one week after the appeal of the Council of People's Deputies to unify Nagorno-Karabakh with Armenia and according to many sources was a direct response to the Council's decision. The perpetrators targeted the victims based solely on ethnicity — being Armenian was the only criterion. Some sources speak of premeditation ahead of the break-out of violence. Cobbles were brought into the city to block and limit access and exit from the town; the perpetrators had previously obtained the list of addresses of the Armenian residents of the city. Warnings by Azerbaijanis sympathetic to their Armenian neighbors instructed them to leave their lights on the night of the 27th; those who shut them off would be assumed to be Armenian. According to several Armenian witnesses and Soviet military personnel, alcohol and anasha, a term referring to narcotics, were brought in trucks and distributed to the crowds, although such accounts were not reported in the media. According to de Waal, the fact that the attackers were armed with homemade weapons that would have taken some time and effort to manufacture suggests a certain level of planning.

Violence broke on the evening of February 27. The attacking groups were of varying age groups. While the main participants were adult males and even some women, there were also young students who took part in vandalizing and looting appliances, shoes, and clothing from the Armenians' homes. The mobs entered the apartment buildings and sought out Armenians where they lived. Some took shelter among their Azerbaijani and Russian neighbors, who also risked being attacked by the mobs.Others turned on the television to watch Azerbaijani music concerts and raised the volume to give the effect that they were in fact Azerbaijanis.

The pogrom was marked by atrocities and savagery. As Waal describes it, "The roving gangs committed acts of horrific savagery. Several victims were so badly mutilated by axes that their bodies could not be identified." Numerous acts of gang rape and sexual abuse were committed, taking place in both the apartments and publicly on the city streets. An account of one such act that was also corroborated by witnesses described how a crowd stripped naked an Armenian woman and dragged her through the streets. Rumors circulating that Armenian women in hospital maternity wards had their fetuses disemboweled were later said to have been false.

In the midst of the attacks, many Armenians sought to defend themselves and improvised by nailing their doors shut and arming themselves with axes, and in some instances a number of intruding rioters were killed.

The weekly Moskovskiye Novosti later reported that eight of the city's twenty ambulances had been destroyed by the mobs. Looting was prevalent and many attackers discussed among themselves on who would take possession of what after they had broken into the apartments. In some cases, televisions were stolen, along with other appliances and household goods; many apartments were vandalized and set on fire.

The lives of many Armenians were protected and saved by their Azerbaijani friends, neighbors or even strangers, who, at the risk of their own lives, let the Armenians hide in their houses or be escorted in their cars out of the city. According to Armenian witnesses, when Soviet troops went door-to-door searching for survivors, they managed to collect thousands of Armenians who had been hiding in Azeri households.

By March 1, Soviet troops had effectively quelled the rioting. Investigations were slated to begin immediately; however, waste disposal trucks cleaned much of the debris on the streets before they arrived. Soviet authorities arrested over 400 men in connection to the rioting and violence.The Soviet media did not initially report the event and remained largely silent, broadcasting instead news related to foreign affairs while the media in Sumgait spoke only on local issues unrelated to the massacre.The Soviet government was initially hesitant to admit that violence had taken place; however, when it did, it was quick to downplay the scale of the event, describing the rioting that had occurred as that perpetrated by "hooligans." TASS reported of "rampage and violence" taking place in Sumgait on March 1, which was provoked on the part of a "group of hooligans" who engaged in various criminal acts. Western journalists were denied access to visit the town by Soviet authorities.

On April 28, 1988, images of the pogrom were broadcast in a 90-minute documentary by Soviet journalist Genrikh Borovik. Borovik criticized the media blackout imposed by the Soviet government, claiming that it ran against Gorbachev's aims of greater openness under glasnost. Eduard Shevardnadze later remarked on the failure to report the massacre in Sumgait as a failure of glasnost itself: "the old mechanisms kicked in, simplifying, distorting or just eliminating the truth about."

Soviet authorities arrested 400 men in connection to the massacre and prepared criminal charges for 84 (82 Azerbaijanis, one Russian, and one Armenian).Taleh Ismailov, a pipe-fitter from one of Sumgait's industrial plants, was charged with premeditated murder and was the first to be tried by the Soviet Supreme Court in Moscow in May 1988. By October 1988, nine men had been sentenced, including Ismailov, who was sentenced to 15 years in prison with a further 33 on trial. Other sentences were more harsh: Ahmad Ahmadov was found guilty and sentenced to be shot by a firing squad for leading a mob and taking part in the murder of seven people.However, 90 of those who were tried were set free after a relatively short time as they were sentenced for hooliganism, rather than for murder and violence.

There were many who expressed their dissatisfaction with the way the trials were organized and conducted. Soviet historian and dissident Roy Medvedev questioned the trials: "Who knows why, but the court examined the Sumgait events by subdividing them into single episodes and not as a programmatic act of genocide." Most Armenians and Azerbaijanis were also dissatisfied with the trials. Armenians complained that the true instigators of the pogrom were never caught whereas Azerbaijanis stated the sentences were too harsh and were upset with the fact that the trials were not held in Azerbaijan. Some Azerbaijanis even went on to campaign for the "freedom for the heroes of Sumgait." Indeed, many of the perpetrators of the pogrom gained titles of national heroes and/or high positions in the government, where they still serve today.