Well, according to the United Nations Relief and Works Agency for Palestine Refugees in the Near East, there are 3.8 million registered Palestinian refugees (defined as "persons whose normal place of residence was Palestine between June 1946 and May 1948, who lost both their homes and means of livelihood as a result of the 1948 Arab-Israeli conflict...UNRWA's definition of a refugee also covers the descendants of persons who became refugees in 1948") living in Jordan, Lebanon, the Syrian Arab Republic, the West Bank and Gaza Strip.

And according to the United Nations Population Information Network, the 1995 Palestinian population was "approximately 6.5 million Palestinians...in 16 countries of the Middle East and North Africa." (info from "DEMOGRAPHY OF THE PALESTINIAN POPULATION WITH SPECIAL EMPHASIS ON THE OCCUPIED TERRITORIES,", by Arjun L. Adlakha, Kevin G. Kinsella and Marwan Khawaja)

Hope that helps... Tired. :)

---Lepus Rex