TECHNICAL NOTES
• The Philippine Statistics Authority (PSA) conducted the 2020 Census of Population and Housing (CPH) in September 2020. The 2020 CPH was a nationwide government undertaking that involved the collection, compilation, evaluation, analysis, publication, and dissemination of data on population count, demographic and socio-economic characteristics of the population, housing characteristics, household characteristics, and barangay characteristics in each barangay, city/municipality, province, and region in the country. With reference to the first census in 1903, the 2020 CPH was the 15th census of population and the 7th census of housing in the Philippines.
• The 2020 CPH was undertaken pursuant to Republic Act No. 10625, also known as the Philippine Statistical Act of 2013, Executive Order No. 352 - Designation of Statistical Activities That Will Generate Critical Data for Decision-Making of the Government and the Private Sector, and Batas Pambansa (BP) Bilang 72, which provide the basis for the decennial conduct of the integrated census of population and housing.
• Information on the count of the population were collected with 12:01 a.m. of 1 May 2020 as the census reference time and date.
• Most of the operational concepts and definitions adopted in the 2020 CPH have also been used in the past censuses of population and housing. The use of standard operational definitions of terms and concepts and adherence to national and international standard classifications were aimed at ensuring the comparability of census results across different census years and census data of other countries.
• A household is a social unit consisting of a person living alone or a group of persons who sleep in the same housing unit and have a common arrangement in the preparation and consumption of food.
• Household population comprises of persons who belong to a household. In determining household membership, the basic criterion is the usual place of residence or the place where the person usually resides. This may be the same or different from the place where he/she is found at the time of the census. As a rule, it is the place where he/she usually sleeps.
• Institutional living quarter (ILQ) is a structurally separate and independent place of abode intended for habitation by large groups of individuals. Such a quarter usually has certain common facilities such as kitchen and dining room, toilet and bath, and lounging area which are shared by the occupants.
• Institutional population comprises of persons who are found living in institutional living quarters (ILQs). They may have their own families or households elsewhere but at the time of the census, they are committed or confined in institutions, or they live in ILQs and are usually subject to a common authority or management, or are bound by either a common public objective or a common personal interest.
• Average household size (AHS) is a measure obtained by dividing the number of persons in households by the number of households.
• His Excellency President Rodrigo R. Duterte declared as official for all purposes the population counts by province, city/municipality, and barangay, based on the 2020 CPH under Proclamation No. 1179 dated 6 July 2021.