Islam in Europe: history, distribution, and contemporary issues

Historical development

The first sustained presence of Islam in southern Europe dates from the early Middle Ages, when the Moors from North Africa established states in Iberia and parts of Sicily. Muslim rule in Iberia lasted for centuries until the Christian reconquest commonly called the Reconquista. In the east, Islam spread into the Caucasus and southeastern Europe largely through the expansion of the Ottoman Empire, which governed large areas of the Balkans and Anatolia from the late medieval period until the early 20th century. When Ottoman political control receded, sizable indigenous Muslim communities remained in parts of the Balkans and the Caucasus.

Geographic distribution and demographics

Europe's Muslim population includes long‑established communities and more recent immigrants. Countries with historic Muslim majorities or sizable native Muslim minorities include Albania (Albania), Kosovo (Kosovo) and Bosnia and Herzegovina (Bosnia and Herzegovina). Transcontinental states with large Muslim populations include Turkey, Azerbaijan and Kazakhstan, while parts of the Russian Federation such as the North Caucasus and other regions contain many Muslim communities (Russia overall has a substantial Muslim population).

• Western Europe has experienced major growth in Muslim populations since the mid-20th century due to immigration and higher birth rates.
• Estimates from research organizations in the early 21st century put Europe's Muslim share in the single digits; figures vary by country and methodology.

Contemporary issues and public debates

The presence of Islam in contemporary Europe is a prominent subject of public discussion. High-profile violent incidents and terrorist attacks, as well as cultural controversies such as the Danish cartoons affair, have driven debates over security, freedom of expression, and multiculturalism. These developments have also fueled discussions about Islamophobia, discrimination, and the role of religion in public life. In many countries these debates intersect with the rise of populist and right‑wing parties that portray Islam as a challenge to national identity (populist movements).

Cultural, social and religious life

Muslim communities in Europe are internally diverse in ethnicity, language, legal tradition and religious practice. Some are largely secular in outlook, especially where Islam has long been part of national life; others maintain strong ties to cultural traditions from countries of origin. Islamic institutions — mosques, community centers, and religious schools — play varying roles across countries, and debates about religious dress, education and accommodation in public institutions are common.

Notable distinctions and facts

Important distinctions include the difference between indigenous Muslim populations with centuries‑long roots in the region and postwar migrant communities that arrived after World War II. The legacy of the Ottoman period, colonial ties to North Africa and the Middle East, and transcontinental states complicate simple East/West or Christian/Muslim binaries. Public statistics and projections continue to evolve, and scholarly work and surveys provide different estimates of numbers, composition and future trends. For further general reading see country studies and comparative surveys available online: Islam overview, Ottoman history, Reconquista, Albania, Kosovo, Bosnia and Herzegovina, Turkey, Azerbaijan, Kazakhstan, Russia, North Caucasus, terrorism, cartoons affair, populism, Islamophobia.