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            Kasarinlan High School is located at Tuna Street, Kaunlaran Village. The school is in Barangay 28 which is under the administration of Chairman Edgar Galgana Jr. It has a total population of  twenty-nine thousand eight hundred twelve (29,812) or a total of five thousand seven hundred ninety-four  (5,794) families. Barangay 28 is the largest barangay in District II. The following streets comprise Barangay 28- Kawal, Landaska,Sawata,Kumpol, KBS, Talilong, Talaba, Tuna, Talangka ,Talakitok, Tahong, Taksay ,Tawilis and Kamada.

Most of the residents live below the poverty line. The common occupations of the residents  are peddlers, vendors, pedicab drivers and factory workers. There are few pedicab operators and tricycle operators and entrepreneurs.

          The literacy level ranges from fifty to sixty –five per cent (50%-65%) of the total population and about thirty-five percent (35%) are under illiteracy level.

In the late seventies ,the community  used to be a barren and swampy land. During the time of the late  President Ferdinand Marcos,  Dagat-Dagatan area  was developed by the Ministry of Human Settlements  to solve housing problem of the urban poor. Dagat-Dagatan  was divided into two villages: Kaunlaran and Kasarinlan traversing C-5 going  to Manila passing  Navotas and the Bay area. Dagat-dagatan served as relocation area for the urban poor in Metro Manila.