This is a list of seasons played by Eintracht Braunschweig in German and European football, from their first competitive to the most recent completed season. It details the club's achievements in major competitions, as well as the club's average attendance and top scorers for each season since 1947-48. Players in bold were also top scorers in their league that season.
^Due to the outbreak of World War I the 1914–15 season was cancelled. Eintracht Braunschweig won a local cup competition staged instead in 1915. From 1915–16 on league play reassumed in a limited fashion until the end of the war.
^Lost championship play-off against Staffel 1 winners Hannover 96 0–2.
^In 1928–29 no regular league matches were played in Northern Germany due to a conflict between the clubs and the Northern German FA. Some major clubs demanded the creation of a single, unified top level league in Northern Germany, while smaller clubs feared to be left out. While some of the big Hamburg and Schleswig-Holstein clubs, including Hamburger SV, Holstein Kiel, and Altona 93, formed a rebel league, most clubs in the Southern parts of Northern Germany sat out the season. In the end six Northern German Oberligas were formed as a compromise for the 1929–30 season.
^The first post-WWII edition of the German cup was held in 1952–53. During the 1950s and 1960s the number of teams participating in the national stages varied between 32 and as little as 4 clubs. Teams qualified in regional stages for the national final rounds. Not until the foundation of the Bundesliga in 1963 first division clubs qualified automatically for the German cup.
Bläsig, Horst/Leppert, Alex (2010). Ein Roter Löwe auf der Brust - Die Geschichte von Eintracht Braunschweig. Göttingen: Die Werkstatt. ISBN978-3-89533-675-1.CS1 maint: Multiple names: authors list (link)
Peters, Stefan (1998). Eintracht Braunschweig. Die Chronik. Kassel: Agon-Sportverlag. ISBN978-3-89609-152-9.
Peters, Stefan/Göttner, Christian (2013). 100 Spiele Eintracht. Die emotionalsten Partien der Vereinsgeschichte von Eintracht Braunschweig. Göttingen: Die Werkstatt. ISBN978-3-7307-0052-5.CS1 maint: Multiple names: authors list (link)