TNR

TNR may refer to:


 * TNR, the gene that encodes the protein Tenascin-R
 * Ivato International Airport, Antananarivo, Madagascar, IATA code
 * The New Republic, an American magazine of politics and the arts
 * Times New Roman, a popular typeface installed on most desktop computers
 * Train Navette Rapide, an express train service in Morocco
 * Trap-neuter-return, a method for managing feral cats
 * T.N.Rajarathnam Pillai (1898-1956), Indian musician
 * True negative rate, in statistics