Plön (German pronunciation: [ˈpløːn] ) is a district in Schleswig-Holstein, Germany. It is bounded by (from the east and clockwise) the districts of Ostholstein and Segeberg, the city of Neumünster, the district of Rendsburg-Eckernförde, the city of Kiel and the Baltic Sea.

The district was established in 1867. In 1932 it was enlarged with parts of the dissolved district of Bordesholm. During the 20th century some municipalities left the district due to incorporation into the city of Kiel.

The inland part of this small district is covered with lakes. The Großer Plöner See ("Great Plön Lake", 29 km) and the Selenter See ("Lake Selent", 22 km) are the largest lakes in Schleswig-Holstein. The lakeland and the adjoining parts of the neighbouring district Ostholstein constitute the region called Holstein Switzerland since the countryside is very hilly. However, the highest hill (Bungsberg) is only 168 m high. North of the lakeland there is the Probstei, a region on the coast of the Baltic Sea.

The coat of arms displays: the nettle leaf from the arms of Holstein an oak leaf, symbolising the forests a grain ear, symbolising agriculture a wavy line and a fish, symbolising the lakelands and the Baltic Sea

Independent towns	and municipalities
Plön Preetz Schwentinental	Ascheberg Bönebüttel Bösdorf

Ämter
1. Bokhorst-Wankendorf Belau Großharrie Rendswühren Ruhwinkel Schillsdorf Stolpe Tasdorf Wankendorf 2. Großer Plöner See [seat: Plön] Bosau (Ostholstein district) Dersau Dörnick Grebin Kalübbe Lebrade Nehmten Rantzau Rathjensdorf Wittmoldt 3. Lütjenburg Behrensdorf Blekendorf Dannau Giekau Helmstorf Högsdorf Hohenfelde Hohwacht Kirchnüchel Klamp Kletkamp Lütjenburg Panker Schwartbuck Tröndel	4. Preetz-Land Barmissen Boksee Bothkamp Großbarkau Honigsee Kirchbarkau Klein Barkau Kühren Lehmkuhlen Löptin Nettelsee Pohnsdorf Postfeld Rastorf Schellhorn Wahlstorf Warnau 5. Probstei Barsbek Bendfeld Brodersdorf Fahren Fiefbergen Höhndorf Köhn Krokau Krummbek Laboe Lutterbek Passade Prasdorf Probsteierhagen Schönberg Stakendorf Stein Stoltenberg Wendtorf Wisch	6. Schrevenborn Heikendorf Mönkeberg Schönkirchen 7. Selent/Schlesen Dobersdorf Fargau-Pratjau Lammershagen Martensrade Mucheln Schlesen Selent
seat of the Amt; town

Media related to Kreis Plön at Wikimedia Commons

• Official website (German)

54°15′N 10°25′E / 54.25°N 10.42°E / 54.25; 10.42