The 1974–75 Rheinlandliga was the 23rd season of the highest amateur class of the Rhineland Football Association under the name of 1.
Bundesliga south, South-West Group, and therefore had to play in the Amateur league in the coming season.
VfL Neuwied represented Rhineland in the 1975 German Football Amateur Championship 1975 and lost in the first round to SpVgg Ludwigsburg (Württemberg).
Ahrweiler BC, SpVgg Bendorf, SG Eintracht Lahnstein and SC Sinzig moved down to the 2.
For the following 1975–76 season, Alemannia Plaidt, SpVgg EGC Wirges and SV Speicher moved up from the 2.