More than 90% of the people are Christian; most were converted and became Westernized to varying degrees during nearly 400 years of Spanish and American rule. The major non-Hispanicized groups are the Muslim population, concentrated in the Sulu Archipelago and in central and western Mindanao, and the mountain groups of northern Luzon. Small forest tribes still live in the more remote areas of Mindanao.

About 87 native languages and dialects are spoken, all belonging to the Malay-Polynesian linguistic family. Of these, eight are the first languages of more than 85% of the population. The three principal indigenous languages are Cebuano, spoken in the Visayas; Tagalog, predominant in the area around Manila; and Ilocano, spoken in northern Luzon. Since 1939, in an effort to develop national unity, the government has promoted the use of the national language, Pilipino, which is based on Tagalog. Pilipino is taught in all schools and is gaining acceptance, particularly as a second language. Many use English, the most important nonnative language, as a second language, including nearly all professionals, academics, and government workers. In January 2003, President Gloria Macapagal-Arroyo ordered the Department of Education to restore English as the medium of instruction in all schools and universities. Only a few Filipino families use Spanish as a first language.

The Philippines has one of the highest literacy rates in the East Asian and Pacific area. About 92% of the population 10 years of age and older are literate.