There were no changes in the geographical-political units of the country during the fourth quarter of 2018 (01 October – 31 December 2018), hence, there were no submitted updates on the Philippine Standard Geographic Code (PSGC) during the quarter. Consequently, the total number of regions, provinces, cities, municipalities, and barangays remained the same with the PSGC updates as of 30 September 2018.

During the second quarter of 2018, the Municipality of Bumbaran in the province of Lanao del Sur was renamed as Municipality of Amai Manabilang per Muslim Mindanao Autonomy Act No. 316, series of 2014 and was ratified through a plebiscite on 07 April 2018.