Two lists of cities are given, presumably in two districts; the first one names twelve cities in all, along with the towns around them (verses 21-24); the second one, fourteen cities and the surrounding towns (verses 25-28).

It is possible to translate verses 21-24 as a unit and to do the same with verses 25-28:
21-24 There were twelve cities, along with the towns around them, which belonged to the tribe of Benjamin. These cities were: Jericho … and Geba.
25-28 There were another fourteen cities, along with the towns around them, which also belonged to the tribe of Benjamin. These cities were: Gibeon … and Kiriath Jearim. This is the land which Joshua assigned to the tribes of Benjamin.

Quoted with permission from Bratcher, Robert G. and Newman, Barclay M. A Handbook on Joshua. (UBS Helps for Translators). New York: UBS, 1983. For this and other handbooks for translators see here .