Demographic Profile

The study of population is required in planning so as to determine the size of human resources in a locality and ascertain their various needs and consider their interests and traits for the economic growth of the community at the local level. Human resources and their needs could be specifically identified by studying the population size, growth, structure, distribution, density, composition, and changes due to births, deaths, in-migration, out-migration, transfer of groups in the same population such as marriages, separation, divorce, and other socio-economic characteristics and the cause and consequences of these factors. Likewise, the age structure of the population determines the potential labor force and identifies the areas for existing and projected population.

Needless to say, the population size, its growth, spatial and age distribution affect the demand for economic goods and services such as food, clothing, and other manufactured products, and the need to generate employment opportunities. An increasing population connotes an increasing demand for housing with necessary amenities. The size and growth of population of consumers determine the demand for water and power supply demand for power supply of households, drainage system and other community facilities such as transportation.

While land resources are definite in area and sometimes limited, or even subject to liquefaction, population density and rural expansion generally increase. Thus, population growth is a major controlling factor in the maintenance or degradation of ecological balance and the massive conversion of protection and production lands like agricultural and forestlands to urban uses.

Municipal Population Size and Growth Rate

Based on the 2010 official census of the Philippine Statistics Authority (PSA), Sison has a current population of 43,979 and in the 2015 PSA census of population and housing, the total population count of the municipality rose to 47,518.

Using the geometric method, for the period 2010 to 2015, it has an annual population growth rate of 1.61 percent. At the end of the planning period, and with a projected annual growth rate of 2.75 percent, it is projected that the municipal population will be at 69,470.