NPO

NPO may refer to:

• Non-Profit Organization
• National Ports Organisation, a British governmental organisation set up by Barbara Castle MP
• National Preservation Office, part of the British Library
• Nauchno-Proizvodstvennoye Obyedineniye (Научно-производственное объединение, Russian for "Scientific and Production Establishment"), title often found in the names of successors to the Experimental Design Bureaux (OKB) of Communist times
• Netherlands Pathfinder Organisation (Nederlandse Padvinders Organisatie), one of the organisations that evolved into Scouting Nederland, the national Scouting organisation
• Netherlands Public Broadcasting (Nederlandse Publieke Omroep), Dutch public radio and television network
• Nil per os, Latin for "nothing by mouth", a medical instruction to withhold oral intake of food and fluids from a patient
• North Pacific Oscillation, an atmospheric teleconnection pattern
• NP optimization problem, optimization problems that are NP-hard
• NPO UK Ltd., a company which had stationery and book shops around Northern Ireland, bought by and rebranded Eason & Son