Rangers has a long-standing rivalry with Celtic, the two Glasgow clubs being collectively known as the Old💹 Firm, which is considered one of the world's biggest football derbies. With more than 600 Rangers supporters' clubs in 35💹 countries worldwide, Rangers has one of the largest fanbases in world football.

Between them the two clubs have won 108 Scottish League championships (Rangers with💹 55 and Celtic with 53), 75 Scottish Cups (Celtic with 41 and Rangers with 34), and 49 Scottish League Cups💹 (Rangers with 28 and Celtic with 21).