Of the diaspora , over two and a half million live in neighboring Jordan , one million is shared between Syria and Lebanon , a quarter million in Saudi Arabia , and Chile 's half a million is the largest concentration outside the Arab world . Of the diaspora , about 2.6 million live in neighboring Jordan where they are approximately half the population , one and a half million between Syria and Lebanon , a quarter million in Saudi Arabia , while Chile 's half a million are the largest concentration outside the Arab world .