The flag of Lower Saxony consists of the flag of the Federal Republic of Germany in Schwarz-Rot-Gold, with the coat of arms of Lower Saxony, shifted slightly toward the hoist.

[1] The flag of Lower Saxony was introduced on 1 May 1951, and made official on 13 October 1952.

In the aftermath of World War II a neutral flag was needed for the state of Lower Saxony which consisted of the formerly separate entities of Hanover, Brunswick, Oldenburg, and Schaumburg-Lippe.

Developed in parallel, there was a design using the Guelph Hanoverian flag of horizontal yellow and white stripes with the coat of arms in the middle.

Today, the former national flags of Hanover, Brunswick, Oldenburg and Schaumburg-Lippe are seen only at historical or folk events, such as festivals.