HRB

HRB may refer to:


 * HRB (gene)
 * HRB Systems, an American defense contractor
 * Boeing HRB-1, a helicopter
 * Croatian Revolutionary Brotherhood (Croatian: Hrvatsko revolucionarno bratstvo)
 * FBI Human Resources Branch, US
 * H&R Block, NYSE symbol
 * Harbin Taiping International Airport, Heilongjiang, China
 * Health Research Board, Ireland
 * House of Responsibility, in Hitler's birth house, Braunau am Inn, Germany
 * HRB, a Rockwell scale of materials' hardness