Rb or RB may stand for:
RBL Bank Limited (formerly known as Ratnakar Bank Limited) is a scheduled commercial bank headquartered in the Kolhapur region of Maharashtra.
The RBS-15 (Robotsystem 15) is a long-range fire-and-forget surface-to-surface and air-to-surface, anti-ship missile.
Eric Dwayne Collins (born June 20, 1968) better known by his stage name RBX (standing for "Reality Born Unknown"), is an American rapper and R&B singer from Long Beach, California.
RBS 70 (Robotsystem 70, "robot" meaning "missile" in this context in Swedish) 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.