NPB can refer to: NAS Parallel Benchmarks, a set of benchmarks developed by the NASA for measuring the performance of supercomputers National Printing Bureau of Japan National Pork Board of the United States Nederlandsche Padvinders Bond, one of the scouting organizations that evolved into Scouting Nederland Newport Beach a city in Orange County, California, United States Nippon Professional Baseball, the highest level of professional baseball in Japan Nitrate-producing bacteria, also known as nitrifying bacteria in the nitrogen cycle Northern Black Polished Ware, a period of South Asian history () Parole Board of Canada, a Canadian government agency NPB or n-PB, n-propyl bromide, solvent Network packet broker, a network monitoring system