The Gauliga Niedersachsen was the highest football league in the Prussian Province of Hanover and the German states of Bremen, Brunswick, Schaumburg-Lippe and Oldenburg from 1933 to 1945.

Shortly after the formation of the league, the Nazis reorganised the administrative regions in Germany, and the Gaue Südhannover-Braunschweig, Ost-Hannover and Weser-Ems de facto replaced the Prussian province and the German states in the region of Lower Saxony (German:Niedersachsen), although de jure the old states continued to exist.

The surprising victory of Hannover 96 in the 1938 championship over the all-dominating Schalke 04 with a 4–3 extra time win in the replay final remained the only triumph for the region.

The season after, the league was upsized to eleven teams due to the integration of Viktoria Wilhelmsburg, the club coming across from the Gauliga Nordmark.

The 1943–44 season was then played in three regional groups of uneven strength, with 23 clubs altogether and a three-team finals round.

The league begun play as an offshoot of the Gauliga Südhannover-Braunschweig in 1943 in the area of the Gau Eastern Hanover with eight teams in a single division.

With the end of the Nazi era, the Gauligas ceased to exist and the northern part of Germany found itself in the British occupation zone.