How many people live the West Bank?

Answer 1

In total it's estimated that around 2,000,000 people live in the west bank

of these 17% are Jewish, 8% Christian and 75% Muslim

While reliable census data exists for the Jewish (and other Israelis) population which stands at 325,750 as of 2011, there is no such reliable data for the Arab population.

A study issued by the Begin-Sadat Strategic Studies estimates the Arab population in the West Bank to be about 1.5 million while higher estimates place it closer to 2.5 million (but this includes East Jerusalem which is part of Israel proper and residents there have Israeli citizenship)

The Jewish population growth rate stood at 5.2% in 2011

while that of the Arab population stood at 2.0%

Answer 2

Population estimates for the West Bank are relatively contentious, especially when East Jerusalem is counted as a part of the West Bank. There are roughly 2.7 million people living in the West Bank and East Jerusalem of whom roughly 700,000 are Israeli Jewish citizens (e.g. Settlers), half in East Jerusalem and half in the rest of the West Bank, and the remaining 2 million are Palestinian Arabs.