Bergen (Eastphalian: Bargen) is a town in the north of Celle district on the Lüneburg Heath, in Lower Saxony, Germany.

Administratively it acts as a municipal borough divided into 12 subordinate parishes based on the town and its surrounding villages: Becklingen, Belsen, Bergen, Bleckmar, Diesten, Dohnsen, Eversen, Hagen, Hassel, Offen, Sülze and Wardböhmen.

Bergen was first mentioned in the records in 1197 and was the centre of a legislative and administrative region, the seat of the district sheriff (Amtsvogtei) and, later, the Royal Hanoverian Office.

After the annexation of the Kingdom of Hanover by Prussia in 1866 the Amt Bergen, formed in 1852, was incorporated into Fallingbostel district, which had been created in 1867.

In particular, the creation of the military training area that is today the Bergen-Hohne Training Area in 1935 encouraged the beginning of a period of urbanisation that has led to Bergen's transformation from an agriculturally based village into the small town it is today, characterised by trade and commerce with agriculture having largely lost its significance.

In the Gebietsreform (municipal reorganization) of 1971, Bergen was given responsibility for the Stadtteile of Becklingen, Belsen, Bleckmar, Diesten, Dohnsen, Eversen, Hagen, Hassel, Nindorf, Offen, Sülze and Wardböhmen.

The area of the original town of Bergen was 11 square kilometres (4.2 sq mi); after the administrative reform it grew to 163 km2.

Due to the presence of foreign troops in the area, including Dutch and British both military and their families have come to Bergen.

This has influenced the cultural environment of the town strongly; for example a typical Dutch carnival is held annually which is very uncharacteristic of this area.

The Bergen-Hohne British base held a bonfire night on 5 November which was free to all local residents to attend forming strong ties with the community.

In the middle of the military training area to the west of Bergen are the well known Sieben Steinhäuser, a group of five megalithic graves from the late Funnelbeaker culture (3500-2800 B.C.

In the centre of town, on the Friedensplatz ("Peace Square") immediately next to St. Lambert's Church are three memorials: On the back of the monument is the crowned cursive monogram "GR" (Georgius Rex) of George V King of Hanover.

Until the end of the Thirty Years' War the private residence of the district advocates (Amtsvögte) also served as their seat (Amtssitz).

In 1709 the building, was completely rebuilt under district advocate, Jost Hinrich Wolff (Bergen's primary school is named after him).

To create this training area, several villages, including Hartem, were evacuated in 1938 by the German Wehrmacht, along with individual homesteads.

On the eastern perimeter of the terrain, near the village of Belsen, at that time called Ostlager, around 100 barrack blocks, 50 horse stables and 40 large vehicle garages were built, along with a medical centre, depots and a target factory.

Several state roads (Landesstraßen) serve the surrounding area which is mainly agricultural and lead, inter alia, to Hermannsburg and Winsen (Aller).