Afghan refugees are citizens of Afghanistan who were forced to flee from their country as a result the continuous wars that the country has suffered since the Afghan-Soviet war, the Afghan civil war, the Afghanistan war (2001–2021) or either political or religious persecution. The 1978 Saur Revolution, followed by the 1979 Soviet invasion, marked the first major wave of internal displacement and international migration to neighboring Iran and Pakistan; smaller numbers also went to India or to countries of the former Soviet Union. Between 1979 and 1992, more than 20% of Afghanistan's population fled the country as refugees. Following the Soviet withdrawal in 1989, many returned to Afghanistan, however many Afghans were again forced to flee during the civil war in the 90s. Over 6 million Afghan refugees were residing in Iran and Pakistan by 2000. Most refugees returned to Afghanistan following the 2001 United States invasion and overthrow of the Taliban regime. Between 2002 and 2012, 5.7 million refugees returned to Afghanistan, increasing the country's population by 25%.

The Soviet–Afghan War was a protracted armed conflict fought in the Soviet-controlled Democratic Republic of Afghanistan (DRA) from 1979 to 1989. The war was a major conflict of the Cold War as it saw extensive fighting between the DRA, the Soviet Union and allied paramilitary groups against the Afghan mujahideen and their allied foreign fighters. While the mujahideen were backed by various countries and organizations, the majority of their support came from Pakistan, the United States, the United Kingdom, China, Iran, and the Arab states of the Persian Gulf. The involvement of the foreign powers made the war a proxy war between the United States and the Soviet Union. Combat took place throughout the 1980s, mostly in the Afghan countryside. The war resulted in the deaths of approximately 3,000,000 Afghans, while millions more fled from the country as refugees; most externally displaced Afghans sought refuge in Pakistan and in Iran. Approximately 6.5% to 11.5% of Afghanistan's erstwhile population of 13.5 million people is estimated to have been killed over the course of the conflict. The Soviet–Afghan War caused grave destruction throughout Afghanistan and has also been cited by scholars as a significant factor that contributed to the dissolution of the Soviet Union, formally ending the Cold War.