Just over 20% of Israel’s population of 9.45 million are Arabs, many of whom self-identify as Palestinians, while 2.9 million Palestinians live in the West Bank and East Jerusalem, which Israel occupied in the 1967 Middle East war. Another 1.9 million Palestinians live in the Gaza Strip, which Israel pulled out of in 2005 but the UN still considers to also be occupied. The vast majority of Palestinians in the West Bank are governed by the Palestinian Authority and all of those in Gaza by the Palestinian militant Hamas movement.
source: bbc.com