DSC Arminia Bielefeld, commonly known as Arminia Bielefeld, is a German professional football and multi-sport organisation based in Bielefeld, North Rhine-Westphalia. Founded on 3 May 1905 as 1. Bielefelder Fußballclub Arminia, the organisation has developed into one of the established sporting institutions in the Ostwestfalen-Lippe region. Its professional men's team competes in the German football league system and plays its home matches at the SchücoArena, which has a capacity of approximately 26,750 spectators. The club has a long history of participation in the Bundesliga, 2. Bundesliga and 3. Liga, and has experienced several promotions and relegations throughout its history. Arminia Bielefeld is more than a professional football team. Its registered association includes a range of sporting and community departments, including men's and women's football, youth football, hockey, billiards, figure skating, wheelchair sports and referee activities. The club also operates the Arminis children's and family club, which organises activities for young supporters and families. Its youth development structure provides opportunities for young footballers through academy teams, coaching and competitive programmes. The professional players' department was separated from the registered association on 1 July 2001 and is operated through DSC Arminia Bielefeld GmbH & Co. KGaA. The club has a strong regional identity and promotes participation, community connection and sporting development. According to its official club information, it had 30,883 members as of 16 June 2026, making it a major membership-based sports organisation in the region. Its social engagement activities include projects relating to inclusion, sustainability and community support. The club's headquarters and home stadium are located at Melanchthonstraße 31a, Bielefeld. With its black, white and blue colours, established supporter culture and broad sporting structure, Arminia Bielefeld remains an important football and community sports organisation in Germany.