RLR

RLR may refer to:
 * Rahal Letterman Racing, an American auto racing team
 * Range Life Records, an American record label
 * Regular local ring
 * Richard Lloyd Racing, a defunct British auto racing team
 * RIG-I-like receptor, a family of intracellular receptors
 * Ruislip Lido Railway, a miniature railway in England
 * Rural Land Register, a British database of land ownership
 * Retron Library Recombineering, a genetic technique that uses retrons