An Israeli settlement is a Jewish civilian community built on land that was captured by Israel from Jordan, Egypt or Syria during the 1967 Six-Day War. Such settlements currently exist in the West Bank, East Jerusalem, and in the Golan Heights. Settlements also existed in the Sinai and Gaza Strip until Israel evacuated the Sinai settlements following the 1979 Israel-Egypt peace agreement and unilaterally disengaged from the Gaza Strip in 2005. Israel dismantled 18 settlements in the Sinai Peninsula in 1982, and all 21 in the Gaza Strip and 4 in the West Bank in 2005. Though the Oslo Accords barred both Israeli and Palestinians from undertaking unilateral actions that would alter the status quo, Israel continues to both expand its settlements and settle new areas in the West Bank. In March 2012, it was revealed that the Civil Administration, a unit of the IDF, has over the years covertly earmarked 10% of the West Bank for further settlement.

The international community considers the settlements in occupied territory to be illegal. Israeli neighborhoods in East Jerusalem and communities in the Golan Heights, areas which have been annexed by Israel, are also considered settlements by the international community, which does not recognise Israel's annexations of these territories. The United Nations has repeatedly upheld the view that Israel's construction of settlements constitutes violation of the Fourth Geneva Convention.

A settler is a person who has migrated to an area and established permanent residence there, often to colonize the area. Settlers are generally people who take up residence on land. However, Canadian First Nations people often refer to all non-natives as "settler peoples", or "settler populations".^{[citation needed]}

In almost every real historical case, settlers live on land which previously belonged to long-established peoples, known as indigenous people (often called "natives", "Aborigines" or, in the Americas, "Indians"). This land is usually settled against the wishes of the indigenes, and then controlled, defended and expanded by force, or it is bought or leased from indigenous people on terms highly favourable to the settlers, sometimes under a treaty (e.g. the Treaty of Waitangi in New Zealand). In some cases (such as Australia), the legal ownership of some lands is contested much later by indigenous people, who seek or claim traditional usage, land rights, native title and related forms of ownership or partial control.