NOB

NOB may refer to:


 * National Orchestra of Belgium
 * Newell's Old Boys, a professional football club in Rosario, Argentina
 * Nederlandse Onderwatersport Bond (Dutch Underwater Federation), the Netherlands skin-diving association
 * Estrada de Ferro Nor Oeste do Brasil, former railway company in Brazil (see Rail transport in Brazil)
 * Nord-Ostsee-Bahn, a German railway company
 * NOB, IATA code for Nosara Airport in Costa Rica
 * Schweizerische Nord Ost Bahn (Swiss Northeastern Railway( (1853–1902), a former Swiss railway company
 * Narodno oslobodilačka borba or narodnoosvobodilni boj ("National Liberation Struggle"), name for World War II in Yugoslavia
 * Nitrite-oxidizing bacteria, alternate term for nitrifying bacteria
 * Name on Back of team jerseys, see Name (sports)