Men comprise 27,989 or 53% of the total population and women constitute to 27,046 or 47% in the total population.

Dependent Population has the total number of 22,782

For school going population , males got 12,665 total number or 23.88% while females only have 11,152 or 21.03% of the total population.

In Municipality of Kiamba the Barangay Poblacion has biggest number of population among the barangays of Kiamba wherein the total number of it reaches to 12,228 equivalents to the total of 2,485 household in which Kiamba defines as an urban area of Kiamba.

The Barangay Poblacion got the highest number of population density that comprises to the total number of 27.17 but only have 0.11 built-up density due to big number of population

Total Population by Age Group and Sex

Based on the 2007 NSO Census, the Municipality of Kiamba has the total population of 53,040 with a growth rate of 2.44%. Men comprise 27,989 or 53% of the total population and women constitute to 27,046 or 47% in the total population.

Age Dependency Ratio Composition

Dependent Population has the total number of 22,782 with the ratio of 1.06, in which men has 11,720 or 22.10% and 11,062 or 20.86% for the women.

School Going Population

The Municipality of Kiamba specifies the School going population: the Pre-school from 3-6 years have 7,170 total number with the ratio of 1.06. The male preschoolers have the total number of 3,689 or 6.96% and the female preschoolers have 3,481 or 6.56%. Elementary from 7-12 years have the total number of 6,697 with a ratio of 1.09 in which 3,492 or 6.58% are males and 3,205 or 6.04% are females. Secondary from13-16 years have the total number of 5,618 with a ratio of 1.19 in which 3,050 or 5.75% are males and 2,568 or 4.84% are females.  And lastly, for the Tertiary from 17-21 years have the total of 24,626 with the ratio of 1.28 in which men have the total of 12,699 or 23.94%, while the women have the total of 11,927 or 22.49%. Meaning in every age group males outnumbered the females in which out of total number of 23,817 with a ratio of 1.14 for school going population males got 12,665 total number or 23.88% while females only have 11,152 or 21.03% of the total population.

Working Age Group/Labor force Composition

Working age population with ages from 15-64 years old was registered at 30,253, with these data 15,966 or 30.10 % of them are men and 14,287 or 26.94% are women. But the Labor force from ages 15 and over increases to 32,175 with the ratio of 1.15. 16,980 or 32.02% of them are men and 15,195 or 28.65% are women.

Household Population by Urban and Rural Barangay and Average Household Size

In Municipality of Kiamba the Barangay Poblacion has biggest number of population among the barangays of Kiamba wherein the total number of it reaches to 12,228 equivalents to the total of 2,485 household in which Kiamba defines as an urban area of Kiamba. While this barangays: Badtasan, Datu Dani, Gasi, Kapate, Katubao, Kayupo, Kling, Lagundi, Lebe, Lomuyon, Luma, Maligang, Nalus, Salakit, Suli, Tablao, Tamadang and Tambilil are classified as rural area in which the total  population of overall barangays comprises to 40,812 with a total of 8,295 number of household. Kiamba has the total of 4.92 average household size.

Urbanization Levels For the Past 20 Years

Based on National Census, only Barangay Poblacion is identified as rural area of Municipality of Kiamba and being the Central Business District and the center for economic activities and has the most number of population with a total of 12,228 or 23% of the total population in the year 2007. The other barangays such as Badtasan, Datu Dani, Gasi, Kapate, Katubao, Kayupo, Kling, Lagundi, Lebe, Lomuyon, Luma, Maligang, Nalus, Salakit, Suli, Tablao, Tamadang and Tambilil has a total registered population of 40,812 or 77% of the total population in Kiamba and these areas were all identified as rural area.

Population Density and Built-up Density

The Barangay Poblacion got the highest number of population density that comprises to the total number of 27.17 but only have 0.11 built-up density due to big number of population living  since it is belong to the urban area. Next to it is Barangay Kayupo with a total of 4.24 population density and 0.69 built-up density while the barangay who got the lowest population density with a total number of 0.40 but the biggest built-up density with the total of 6.12 is Barangay Gasi in which identified as rural area.

Historical Growth of Population

The first census of population conducted in Kiamba was in December 31, 1918 with a total population of 12,734.  Population count those early years in Kiamba was very low because Christian settler from Luzon and other parts of the country just begun to arrive in this far flung place in Southern Mindanao.  Kiamba’s  political jurisdiction at that time includes district of Kling on the east and Barrio Bentugan, annexed to Lebak, and barrios of Balingao,  Palimbang,       Kanipaan,  Kraan,  Maganao,  Malisbong,  Milbuk,  Sangay, and Wali, all in the western part of the municipality and it went as far as Siguil now boundary of General Santos City and Maasim.

The second census of the population was done in January 1, 1939 with a total population of 14,687.  Kiamba ‘s population rose by 15.34% from 1918 to 1939 with an annual growth rate of 0.72%.

1948 census of population result show that population of Kiamba grew up by 0.74% from 1939 to 1948 with annual growth rate of 0.83%.  The low population rate was due to low migration, as a result of the World War II  and the exclusion of some barangays on the west except the municipality of Maitum, formerly a Barangay of Kiamba.  Total count in 1948 was registered at 15,824.

In 1960 Kiamba’s population was doubled within the span of twelve years, the population  was registered at 104.5% with an annual growth rate of 6.14%,  it was during this year when Christian settlers coming from Ilocos Region, Cebu and Leyte and other parts of the country begun to migrate and look for an opportunity in Kiamba.  A total population of 32, 358 was registered in February 15, 1960 census of population

The 1970 census showed a negative growth rate at 4.04%.  The negative indication of our population was due to decrease in our political jurisdiction in 1969, or when Maitum and Maasim was created as a municipality.  1970’s population was registered at 21,424.

In 1975 growth rate was very low at 0.52% or just a mild increased 2.62% From1970 to1975  , population was registered at 21,968.  During this years the in-migration was lower than out-migration due to the unstable peace and order condition not only in Kiamba but as well as the whole island of Mindanao.

The May 1, 1980 census of population result shows that within the span of five years Kiamba’s population rose  by 29.50% with an annual grown rate of 5.30%.  The opening of MILUDECO in 1975, a multi million logging company boosted the economy of the municipality and that in-migration also increases.  Population count was registered at 28,467.

In 1990, a census of population was conducted with a registered annual growth rate of 2.21%, the lowest so far in the history of Kiamba.  It was during this decade that Population Development Program was fully implemented all throughout the nation. The low growth rate is a significant indicator that the program was successful.

Another census of population was conducted in 1995 with a total population count of 39,647 with a slight increase of 4,229 or 10.82 % increase from 1990. Based on the 1990 and 1995 census population Annual growth rate was registered at 2.41%. There was a slight increase in the annual growth rate brought about by the abolition of the population program.

Crude Birth Rate (CBR) and Crude Death Rate for the Last Five Years

The records shows that from the 2006 crude birth rate of 18, it raised in 2007 to 10% and reached a total birth rate of 21.9 on the year 2010. With such increase in crude birth rate, the municipality’s death rate also decreased reaching the rate of 2.5 or -60%. This could be the result of Kimaba’s extensive and intensive health programs particularly in Maternity care and child care that further improved its birth statistics and decreasing the mortality rates in the municipality.

Literacy Rate of Population 5 years Old and Over

Literacy rate for the entire population from ages 5 years old and over is 37,396 or 81%. But this is exceptionally higher among children of school age sector. And the illiterates consist of 2,934 or 6.37% majority of them are those who belong to the tribal minority such as the T’bolis and Muslims. Also it can be noted that younger workforces are more literate than the old ones.