NOP or N.O.P. may refer to:

Science and technology NOP (code), an assembly language instruction etc. that effectively does nothing at all 3-Nitrooxypropanol, an enzyme inhibitor Nociceptin receptor, a neurotransmitter receptor in the opioid receptor family

Organisations Croatian Partisans (Narodnooslobodilački pokret), a former resistance movement in Yugoslavia National Opinion Polls, a pollster acquired by GfK National Revival of Poland (Narodowe Odrodzenie Polski), a nationalistic Polish political party Northern Ontario Party, a political party in Ontario, Canada

Sports New Orleans Pelicans, a National Basketball Association team based in New Orleans, Louisiana, US Nike Oregon Project, an athletics team

Other uses New Orleans Protocol, a 2004 agreement among white supremacist and neo-Nazi groups National Organic Program, an American organic food certification program Network of practice, in social science North Point station (station code NOP), a train station on the Hong Kong MTR Island Line Sinop Airport (IATA code NOP), an airport in Sinop, in the Black Sea Region of Turkey

See also Noop (disambiguation)