The population of Gainza as of 2020 is 11,584

Gainza's population as of May 1, 2020 was 11,584, based on the 2020 Census of Population and Housing (2020CPH).  Gainza is the least populous municipality of Camarines Sur.  The 2020 population is higher by 322 compared with the population of 11,262 in 2015, and higher by 1,239 compared with the population of 10,345 in 2010.

From 2015 to 2020, the population of Gainza increased by 0.59 percent annually, on average.  By comparison, the rate at which the municipality's population grew during the period 2010 to 2015 was higher at 1.63 percent.

Household population comprises 99.91 percent of the total population

The household population of Gainza reached 11,574 persons in 2020.  This is higher by 322 persons than the household population reported in 2015, and 1,233 persons more than the 10,341 household population posted in 2010.

In 2020, the household population comprised 99.91 percent of the total population in Gainza, while the remaining 0.09 percent comprised the institutional population or those residing in collective or institutional living quarters such as hotels, hospitals, orphanages and home for the aged, corrective and penal institutions, and military camps.

Sex Ratio is at 100 males per 100 females

Males accounted for 50.0 percent of the total household population in 2020 while females comprised 50.0 percent.  These figures resulted in a sex ratio of 100 males for every 100 females.

Median age is 23.5 years

In 2020, the median age of the population of the municipality was 23.5 years, which means that half of the population was younger than 23.5 years.

Moreover, one in every three persons (33.0 percent) were under 15 years old. Zero to four comprised the largest age group, followed by those in the five to nine and ten to fourteen age groups.  Males (50.5 percent) outnumbered females (49.5 percent) in the zero to 49 age group.  On the other hand, there were more females (52.2 percent) than males (47.8 percent) in the older age groups (50 years old and over).

Dependency ratio

The young dependents (0 to 14 years) comprised 33.0 percent of the household population in 2020.  Meanwhile, the old dependents (65 years and over) posted a share of 6.5 percent.

The overall dependency ratio was 66, which indicates that for every 100 working-age population (15 to 64 years), there were about 66 dependents (55 young dependents and 11 old dependents).

Senior citizens comprise 9.6 percent of the household population

Senior citizens are those aged 60 years old and over.  In 2020, senior citizens made up 9.6 percent of the 11,574 household population of Gainza.  Among the senior citizens, females (53.7 percent) outnumbered the males (46.3 percent). 

The ageing index or the proportion of persons aged 60 years and over per 100 persons under the age of 15 years was computed at 29.2 percent in 2020.  This means that there were twenty nine elderly aged 60 years and over for every one hundred children under 15 years old.