Kaltenkirchen (nicknamed Kaki; Low German: Koldenkarken or Kolenkarken) is a town located 35 km north of Hamburg in Germany.

First mentioned in the 14th century, it flourished during the Industrial Revolution to accommodate the large number of workers in Hamburg.

[3] Kaltenkirchen station is well known in northern Germany as being the central node of the AKN railway company (Altona - Kaltenkirchen - Neumünster) trains which link many of the smaller south Schleswig-Holstein towns with the Hamburg underground network.

The new railway station has been built to accommodate Kaltenkirchen's ever growing community of workers and tourists.

The southern parts of Kaltenkirchen include an industrial area where boiled sweets are produced.