Preetz (German pronunciation: [ˈpʁeːts]) is a town southeast of Kiel in the district of Plön, in Schleswig-Holstein, Northern Germany.

Preetz is located in a hilly area referred to as the Holsteinische Schweiz (Holstein Switzerland) with a number of lakes and forests surrounding the town.

Lakes include the Postsee, Lanker See and the smaller Kirchsee in the centre of town, which forms part of the river Schwentine.

There are multiple nature reserves around Preetz that attract tourists and locals alike for biking and hiking, especially in the summer months.

The first mention of Preetz dates from the year 1185, when Ecbrecht Procensis writes about the location Poretz in the Versus de Vicelino.