The 1970–71 Regionalliga was the eighth season of the Regionalliga, the second tier of the German football league system. The league operated in five regional divisions, Berlin, North, South, Southwest and West. The five league champions and all five runners-up, at the end of the season, entered a promotion play-off to determine the two clubs to move up to the Bundesliga for the next season. The two promotion spots went to the Regionalliga West champions and runners-up VfL Bochum and Fortuna Düsseldorf.
The 1970–71 season saw three new clubs in the league, SV Meppen, SC Sperber Hamburg and Heider SV, all three promoted from the Amateurliga, while no club had been relegated from the Bundesliga to the league.
The 1970–71 season saw two new clubs in the league, VfL Nord Berlin and Alemannia 90 Berlin, both promoted from the Amateurliga, while no club had been relegated from the Bundesliga to the league.
The 1970–71 season saw three new clubs in the league, Eintracht Gelsenkirchen and Westfalia Herne, both promoted from the Amateurliga, while Alemannia Aachen had been relegated from the Bundesliga to the league.
The 1970–71 season saw two new clubs in the league, VfB Theley and VfR Frankenthal, both promoted from the Amateurliga, while no club had been relegated from the Bundesliga to the league.
The 1970–71 season saw four new clubs in the league, SV Göppingen, FC Wacker München and Viktoria Aschaffenburg, all threepromoted from the Amateurliga, while TSV 1860 München had been relegated from the Bundesliga to the league.