Keln is a walled city near the coast in the south-west of Midderland. It is rule by Lord Brock.
In Last Argument of Kings, a peasant rebellion starts near Keln under the leadership of the Tanner. Colonel Jezal is sent to quell it, which he succeeds in doing.
Gurkish fleet lands near Keln, before putting siege to Adua. Lord Brock allows them to pass through his land, having made a deal with the Gurkish for the crown of the Union.