RNR is the Royal Naval Reserve, the volunteer reserve force of the Royal Navy in the United Kingdom.
RNR may also refer to: Ribonucleotide reductase Right node raising, in linguistics, a mechanism that sees parallel structures share material to their immediate right Rock and roll, a genre of music Royal Newfoundland Regiment, a regiment of the Canadian Army "RnR", a franchise of the FGL Sports R n R, an album by Richard Elliot and Rick Braun the risk-need-responsivity model of offender treatment Rock'n'Reel, a former name of music magazine RNR
See also R&R (disambiguation)