Europe
In 2017, the population of Europe was estimated to be 742 million according to , which is slightly more than one-ninth of the world's population. This number includes Asian Russia (Siberia, about 36 million people) but excludes the European part of Turkey, Cyprus and the Transcaucasian countries.
A century ago, Europe had nearly a quarter of the world's population. The population of Europe has grown in the past century, but in other areas of the world (in particular Africa and Asia) the population has grown far more quickly. Among the continents, Europe has a relatively high population density, second only to Asia. Most of Europe is in a mode of Sub-replacement fertility, which means that each new(-born) generation is being less populous than the older.
The most densely populated country in Europe (and in the world) is the microstate of Monaco.
Arabs
There are millions of Arabs living in Europe mostly concentrated in France (about 6,000,000 in 2005). Most Arabs in France are from the Maghreb but some also come from the Mashreq areas of the Arab world. Arabs in France form the second largest ethnic group after French people of French origin. Spain (about 800,000 to 1,600,000 – 1,800,000), there have been Arabs in Spain since the early 8th century when the Umayyad conquest of Hispania created the state of Al-Andalus. Germany (over 1,000,000), Italy (about 680,000), United Kingdom (366,769 to 500,000). Greece (250,000 to 750,000), In addition, Greece has people from Arab countries who have the status of refugees (e.g. refugees of the Syrian civil war) or illegal immigrants trying to immigrate to Western Europe. Sweden (210,400). Netherlands (180,000). Denmark (121,000). And in other European countries, such as Norway, Austria, Bulgaria, Switzerland, Republic of Macedonia, Romania and Serbia. As of late 2015, Turkey had a population of 78.7 million, with Syrian refugees accounting for 3.1% of that figure based on conservative estimates. Demographic trends indicate that the country already had from 1,500,000 to more than 2,000,000, so Turkey's Arab constituency now numbers anywhere from 4.5 to 5.1% of the population. In other words, nearly 4–5 million Arab inhabitants.