NPSS may refer to:
IEEE Nuclear and Plasma Sciences Society, a transnational group of about 3000 professional engineers and scientists Norman Park State School, a co-educational, state primary school in Norman Park, Queensland, Australia North Park Secondary School, a high school located in Brampton, Ontario, Canada Nottawasaga Pines Secondary School, a high school located in Angus, Ontario, Canada National Public Safety Solutions, a company located in Austin, Texas, United States Numerical Propulsion System Simulation, software usually used to analyze gas turbine engines • Netherlands Park Secondary School, numerous private schools in South Africa