NBY

NBY, or nby, may refer to:


 * nby, the ISO 639-3 code for the Ningera language spoken in Sandaun Province, Papua New Guinea
 * NBY, the National Rail code for Newbury railway station in the county of Berkshire, UK
 * NBY, the NYSE American stock exchange code for NovaBay Pharmaceuticals, a US biopharmaceutical company