Rb

Rb or RB may refer to:
*Hyundai RB, a series of Korean buses
*Nissan RB engine
*Rancho Bernardo, a community in San Diego
*Réseau Breton, a French railway network in Brittany
*Retinoblastoma protein, a tumor suppressor protein
*Robotboy, an animated series
*Rock Band, a music video game
*Rubidium, an element
*Running back, a position in American football
*SJ Rb, a Swedish locomotive
*Syrian Arab Airlines, IATA code
*Benin Rebirth Party, a political party in Benin