The Philippine Standard Geographic Code (PSGC) is a systematic classification and coding of geographic areas in the Philippines. Its units of classification are based on the four well-established levels of geographical-political subdivisions of the country such as the region, the province, the municipality/city and the barangay.
The PSGC was developed in 1976 by the Statistical Coordination Office (now the NSCB) of the National Economic and Development Authority (NEDA) through its Inter-Agency Committee (IAC) on Geographic Classification by integrating the different geographic classification systems used by different government agencies.
The PSGC which was published in 1977 was recommended by Statistical Advisory Board (SAB Resolution No. 4-76) for adoption by all concerned government agencies to ensure a uniform and compatible system of compiling and processing of statistics requiring geographic disaggregation.
The 1977 PSGC was based on the inventory of geographical-political units all over the country from the regional down to the barangay level as of December 31, 1976 prepared by the IAC on Geographic Classification. Provinces, regardless of their region, municipalities/cities, within their respective provinces and barangays within their respective municipality/city were assigned codes sequentially following the procedure described in detail in the annex page of this manual.
Due to continuing legislations affecting the boundaries, names, status, and number of existing geographical/political units especially at the barangay level, the PSGC computer file was continuously updated to keep it relevant to the needs of the users. Updating was done following the procedures described in the text of the 1977 PSGC Municipality Code Book. The first updating of the PSGC computer file was done in 1979 by the NEDA Technical Working Group on Geographic Classification (TWG-GC) based on the results of barangay verification conducted in that year by the Bureau of Local Government of the former Department of Local Government and Community Development (DLGCD) in coordination with the then National Census and Statistics Office (NCSO) now National Statistics Office (NSO). This was done in preparation for the 1980 Census of Population and Housing (CPH).
The second updating was done in 1985 based on the Masterlist of Barangays as of May 12, 1983 established by the former NEDA Technical Working Group on Geographic Classification by reconciling the: (a) NCSO barangay list based on the 1980 CPH, (b) COMELEC Integrated Barangay List based on the results of the 1982 Barangay Elections, (c) National Barangay Operations Office (NBOO) Masterlist of Barangays based on the nationwide Barangay Profile Survey conducted in 1983, and (d) Ministry of Local Government (MLG) Official Barangay Masterlist as of July 9, 1982 based on the nationwide verification conducted by the Planning Service and the defunct Operations Monitoring and Support Office (OMSO) of the MLG. As a result of this updating, a draft of 1985 PSGC was generated, however, major events such as the 1986 EDSA Revolution and subsequent verification and cleansing of the list of barangays particularly in Lanao provinces pursuant to E.O. 108, precluded its final approval and release for adoption.
The third updating of the PSGC computer file was done in 1989 prior to the conduct of the 1990 CPH. This was done under the leadership of the newly created National Statistical Coordination Board (NSCB) based on the NBOO updated masterlist of barangays as of June 30, 1989 and the COMELEC list of newly created barangays which were approved in the plebiscites.
Subsequent updating of the PSGC computer file from 1990 to 1991 were done by the NSCB Classifications and Standards Division based on the quarterly updated masterlist of barangays furnished by the NBOO which was the official source agency for barangay list. However, with the release of the 1990 Census of Population and Housing -( Report No. 2A: Population by Province, City, Municipality and Barangay ) and COMELEC results of the May 1989 elections, it was deemed necessary to revise and update the 1977 PSGC considering that there were barangays in the NBOO list which were not consistent with the NSO and COMELEC lists.
Consequently, the NSCB, in line with its function of developing and maintaining standard classification systems, reorganized the former TWG on Geographic Classification and tasked the group to revise the 1977 PSGC based on the reconciled lists of NBOO, NSO and COMELEC. The TWG is composed of representatives from the COMELEC, NBOO and Planning Service of the Department of Interior and Local Government (DILG), National Mapping and Resource Information Authority (NAMRIA), National Computer Center (NCC), National Statistics Office (NSO), and NSCB.