SPD Nordrhein-Westfalen is a political party in German state North Rhine-Westphalia and is, with 97,300 members, the biggest state group of Social Democratic Party of Germany (SPD).

Regional organizations of SPD state group:{ The Regions are headgroups of 54 lower state groups (Unterbezirke), each covering either a district-free City (Kreisfreie Stadt) or a District (Kreis).