Which is Jerusalem: so it seems this city did properly and primarily belong to Benjamin, although the tribe of Judah had also an interest in it, either because some part of it was allotted to them, or because the Benjamites gave them a share in it, for the assistance which either they had received or did expect from that potent tribe, for the getting or defending of that very important place. See Poole on "Joshua 15:63". It is more than probable that all the cities belonging to this tribe are not here named, because Anathoth and Almon are omitted here, but expressed Joshua 21:18.
Related Commentaries of Joshua 18:28
Joshua 18:28
28 And Zelah, Eleph, and Jebusi, which is Jerusalem, Gibeath, and Kirjath; fourteen cities with their villages. This is the inheritance of the children of Benjamin according to their families.