Population of Zambales (excluding Olongapo City) increased at the rate of 2.11 percent annually
Based on the 2010 Census of Population and Housing (CPH), the province of Zambales, excluding Olongapo City, posted a total population of 534,443 persons as of May 1, 2010. This is larger by 100,901 persons compared to its total population of 433,542 persons counted in the 2000 CPH. The increase in the population count from 2000 to 2010 translated to an average annual population growth rate (PGR) of 2.11 percent. This is higher than the 1.61 percent annual PGR of the province between the census years 1990 and 2000.