According to multiple sources, the population of the Gaza Strip is approximately 2.1 million people. This includes some 1.7 million Palestinian refugees. The population is predominantly Sunni Muslim, with a minority of Palestinian Christians. The Gaza Strip is one of the most densely populated places in the world, with around 2 million Palestinians living on some 365 square kilometers. The population growth rate in Gaza is 2.91%, which is the 13th highest in the world. The majority of the Palestinians in Gaza descend from refugees who were driven from or left their homes during the 1948 Arab-Israeli War.