Zamboanga Sibugay, which was created on February 22, 2001 under Republic Act No. 8973, is composed of municipalities taken from Zamboanga del Sur. The population of this province was 546,186 persons as of August 1, 2007, based on the 2007 Census of Population (POPCEN 2007). This figure was higher by 48,947 persons over the population count of 497,239 persons in 2000. The recent population count of the province resulted to an annual growth rate of 1.30 percent for the period 2000 to 2007.

Zambales posted a total population of 493,085 persons as of August 1, 2007. This registered an increase of 59,543 persons over the total population of 433,542 persons in 2000. The 2007 figure translated to an annual population growth rate of 1.79 percent for the period 2000 to 2007.

The total population of Angeles City as of August 1, 2007 was 317,398 persons, an increase of 53,427 persons over its total population of 263,971 persons in 2000. This 2007 figure translates to an annual population growth rate of 2.57 percent for the period 2000 to 2007, lower by 0.04 percentage point than the 2.61 percent annual population growth rate recorded from 1995 to 2000.