The Maniacs is a passionate fan club dedicated to supporting FK Željezničar, a prominent football club based in Grbavica. Established in 1987, The Maniacs serve as the official general sponsor of FK Željezničar, embodying a deep commitment to the team's success and community engagement.

Members of The Maniacs enjoy exclusive benefits, including access to news updates, membership options, and engagement through forums where fans can connect and share their love for the club. The organization also offers a merchandise shop featuring a variety of club-related products to help fans showcase their team spirit.

In addition to support during matches, The Maniacs actively participate in club marketing and community projects, fostering a vibrant atmosphere around FK Željezničar. With a rich history of unwavering dedication, The Maniacs continue to play an integral role in the identity and culture of Željezničar football, making them an essential part of the club's journey through the seasons.