Nosa or NOSA may refer to:
Places Nosa, Spain, singular population entity in Balsareny Nosa (Russia), river in Yaroslavl Oblast, Russia
People Nosa (musician) (born 1981), Nigerian gospel singer Nosa Igiebor (born 1990), Nigerian footballer Nosa Igiebor (journalist) (born 1952), Nigerian journalist Iuliu Nosa (born 1956), Romanian politician
Organizations Norwegian Space Agency Iran Software & Hardware Co. (NOSA)
Other uses Nosa (antlion), an antlion genus in the tribe Palparini NASA Open Source Agreement NOAA Observing System Architecture Nosa, Serbia, a hamlet in Serbia