The 2015–16 Regionalliga was the eighth season of the Regionalliga, the fourth under the new format, as the fourth tier of the German football league system. The champions of Regionalliga Nord – SV Werder Bremen II, the champions of the Regionalliga Nordost – 1. FC Magdeburg, and the champions of Regionalliga Bayern – Würzburger Kickers were promoted to the 3. Liga. Borussia Dortmund II, SpVgg Unterhaching and SSV Jahn Regensburg were relegated from 3. Liga.
18 teams from the states of Bremen, Hamburg, Lower Saxony and Schleswig-Holstein competed in the third season of the reformed Regionalliga Nord. 15 teams were retained from the last season and 3 teams were promoted from the Oberliga – Niedersachsenliga champions SV Drochtersen/Assel and the two Regionalliga North promotion playoff winners VfV 06 Hildesheim, Niedersachsenliga runners-up, and TSV Schilksee, Schleswig-Holstein-Liga champions.