The Old Firm Casuals are a British Oi! band formed in 1983. They are known for their aggressive sound and lyrics that often deal with working-class issues and football hooliganism. The band has released several albums and singles over the years, and they continue to tour and perform regularly.

The Old Firm Casuals are one of the most popular Oi! bands in the world, and they have a loyal following of fans. Their music is often described as being "anthemic" and "working-class," and it has been praised for its energy and passion. The band has been featured in several documentaries and articles, and they have been credited with helping to popularize Oi! music in the United States.