Rb or RB may stand for:
RBD was a Latin pop group from Mexico that gained popularity from Televisa's soap opera Rebelde, and found international success from 2004 until their separation in 2009. RBD has sold over 60 million albums worldwide and ten million albums in the United States, making them the most successful Latin pop group of all-time.
RBL Bank Limited is a scheduled commercial bank, headquartered in the Mumbai region of Maharashtra, India.
The RBS-15 (Robotsystem 15) is a long-range fire-and-forget surface-to-surface and air-to-surface, anti-ship missile.
RBS 70 (Robotsystem 70, "robot" meaning "missile" in Swedish context) is a man-portable air-defense system (MANPADS) designed for anti-aircraft warfare in all climate zones and with little to no support from other forces.