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 Records worldwide, 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.
RBT is an Australian factual television series that looks at the everyday workings of sobriety check points by Random Breath Testing (or RBT) police units, and is narrated by Australian actor Andrew Daddo.