The Osterholz Geest is an undulating, sandy area of ground moraine between the city of Bremen and the towns of Bremerhaven and Bremervörde.
The Osterholz Geest forms the southern part of the Wesermünde Geest. To the west it borders on the marsh known as Osterstade on the east bank of the Lower Weser and to the east on the Hamme depression with its great bog, the Teufelsmoor ("Devil’s Bog"). To the north it transitions into the depressions, interspersed with geest ridges, between the coastal marshes of Land Wursten and the River Oste, which form the northern part of the Wesermünde Geest. To the south it extends as far as the high river banks on the Weser and Lesum. This sharply defined edge of geest runs northeast through the parish of Ritterhude and the county town of Osterholz-Scharmbeck as far as the region of Bremervörde. There the Osterholz Geest borders on the Zeven Geest near Karlshöfen. The Joch, which forms both ridges of geest at this point, dates back to a Saale glaciation water outlet (Gletschertor) and is the northern end of the Hamme glacial valley, in whose depression the Teufelsmoor ("Devil’s Bog") was formed.
The northern and western edge of the geest are, by contrast, flat and transition in the northwest into the Beverstedt Moorgeest region around Bremerhaven. The highest point above sea level is the Langen Heide (48 metres (157 ft)) between Osterholz-Scharmbeck and Garlstedt.
The largest part of this landscape belongs to the district of Osterholz, the north to Cuxhaven and Rotenburg districts, the southwest to Bremen-Nord. The border area between Bremen-Nord and the district of Osterholz is also known as Bremen Switzerland.