The province of Ilocos Sur recorded a total population of 594,206 persons in the 2000 Census of Population and Housing (Census 2000). The figure was higher by 48,821 persons over the 1995 census results. This registered a 1.85 annual growth rate, which was twice as much as that of 1995 (0.90 percent). A corresponding ten percent increase on the number of households was also observed, from 108,329 households in 1995 to 119,212 households in 2000. This resulted to an average household size of 4.98 persons, slightly lower than the 5.03 average household size recorded in 1995.

The province of Ifugao registered a total population of 161,623 persons in the year 2000 up from 149,598 in 1995. This figure gave the province an average annual growth rate of 1.67 percent, an increase of 1.38 percentage points from the 1990 to 1995 period. The number of households also rose to 31,346, higher by 2,145 households compared to the 1995 figure. This gave an average household size of 5.2 persons, a slight increase from 1995 (5.1) and the national average (five persons).

The total population of Eastern Samar as of May 2000, was 375,822 persons, an increase of 13,498 persons over the 1995 Census of Population results. This translated to an annual growth rate of 0.79 percent, from 1.80 percent in 1995. A corresponding increase on the number of households was also recorded at 73,032 households, higher by 5,453 households over the 1995 figure. This resulted to an average household size of 5.14 persons, slightly lower than the average household size recorded in 1995 but higher than the national average of five persons.