Segeberg (German pronunciation: [ˈzeːɡəˌbɛʁk] ; North Frisian: Segebärj) is a district in Schleswig-Holstein, Germany. It is bounded by (from the southwest and clockwise) the districts of Pinneberg, Steinburg and Rendsburg-Eckernförde, the city of Neumünster, the districts of Plön, Ostholstein and Stormarn, and the city state of Hamburg.

The history of the district is connected to the history of Holstein. In 1134, the castle of Segeberg was erected as a regional centre from where the reeve of Segeberg ruled. When Schleswig-Holstein became a Prussian province in 1865, the Prussian administration established the district of Segeberg.

Since then, the district has grown considerably twice: In 1932 parts of the dissolved district of Bordesholm joined the district; in 1970 the city of Norderstedt became part of the district.

The district of Segeberg consists of the agricultural plains between the cities of Neumünster and Hamburg. A southwestern portion of the hilly lakeland called "Holsteinische Schweiz" (Holsatian Switzerland) belongs to the district, as well as some northern suburbs of Hamburg.

The coat of arms displays:

• four steeples forming a cross, commemorating the missionary activities of bishop Vizelin of Segeberg who Christianised Holstein in the early Middle Ages
• the heraldic nettle leaf of Holstein in the middle of the cross
• four green water lily leaves from the arms of Segeberg's reeves

Independent towns and municipalities
Bad Bramstedt Bad Segeberg Kaltenkirchen Norderstedt Wahlstedt Ellerau Henstedt-Ulzburg

Ämter
1. Auenland Südholstein Alveslohe Hartenholm Hasenmoor Lentföhrden Nützen Schmalfeld 2. Bad Bramstedt-Land [seat: Bad Bramstedt] Armstedt Bimöhlen Borstel Föhrden-Barl Fuhlendorf Großenaspe Hagen Hardebek Hasenkrug Heidmoor Hitzhusen Mönkloh Weddelbrook Wiemersdorf 3. Boostedt-Rickling Boostedt Daldorf Groß Kummerfeld Heidmühlen Latendorf Rickling 4. Bornhöved Bornhöved Damsdorf Gönnebek Schmalensee Stocksee Tarbek Tensfeld Trappenkamp	5. Itzstedt Itzstedt Kayhude Nahe Oering Seth Sülfeld Tangstedt (Stormarn district) 6. Kisdorf Hüttblek Kattendorf Kisdorf Oersdorf Sievershütten Struvenhütten Stuvenborn Wakendorf II Winsen 7. Leezen Bark Bebensee Fredesdorf Groß Niendorf Högersdorf Kükels Leezen Mözen Neversdorf Schwissel Todesfelde Wittenborn	8. Trave-Land [seat: Bad Segeberg] Bahrenhof Blunk Bühnsdorf Dreggers Fahrenkrug Geschendorf Glasau Groß Rönnau Klein Gladebrügge Klein Rönnau Krems II Negernbötel Nehms Neuengörs Pronstorf Rohlstorf Schackendorf Schieren Seedorf Stipsdorf Strukdorf Travenhorst Traventhal Wakendorf I Weede Wensin Westerrade
seat of the Amt

Media related to Kreis Segeberg at Wikimedia Commons

• Official website (German)

53°55′N 10°10′E / 53.92°N 10.17°E / 53.92; 10.17