Caloocan has 188 barangays divided into 2 legislative districts divided by Samson Road and EDSA. District 1 is composed of 70 barangays, which include Barangays 1–4, 77-85 and 132–188, while District 2 is composed of 118 barangays, which include Barangays 5 to 76 and 86 to 131. The city uses a hybrid system for its barangays, further dividing the cities into 16 Zones. Among the cities in Metro Manila, only Manila, Pasay and Caloocan implement the so-called "Zone Systems". A zone is a group of barangays in a district. Although a zone is considered a subdivision in the local government units, the people do not elect a leader for the zone in a popular election similar to the normal barangay or local elections as the system is merely for statistical purposes. Further, all barangays have their corresponding numbers but only a few — mostly in the northern part — have corresponding names. However, names of barrios and districts do not necessarily coincide with barangay perimeters. Barangays in southern Caloocan are smaller compared to their northern counterparts.