RSB

The initialism RSB may refer to:

• Rajapur Saraswat Brahmins, an Indian—Hindu social community
• Rashid School For Boys, Dubai
• Rebecca Sean Borgstrom, former name of role-playing game author Jenna Moran
• Relief Society Building, a building in Salt Lake City, Utah, belonging to the LDS Church
• Revolutionary Socialist League (Revolutionär Sozialistischer Bund, RSB), A German far left organisation, connected to the Fourth International
• Riverside School Board, an English-language school board in the province of Quebec, Canada
• The reporting mark for the Rochester Subway
• Ross School of Business, Stephen Ross School of Business at University of Michigan
• Roundtable on Sustainable Biofuels, a standard-setting and certification body for mitigating the social and environmental impacts of global biofuel production
• Royal Society for the Blind of South Australia Inc.
• Rajalakshmi School of Management, a Business School based in Chennai, Tamil Nadu, India.