Nasir bin Olu Dara Jones (; born September 14, 1973), better known as Nas , is an American rapper, songwriter, entrepreneur, record producer and actor. The son of jazz musician Olu Dara, Nas has released eight consecutive platinum and multi-platinum albums and sold over 25 million records worldwide since 1994. He is also an entrepreneur through his own record label; he serves as associate publisher of Mass Appeal magazine and is the owner of a Fila sneaker store. He is currently signed to Mass Appeal Records.

Nas, NaS or NAS may refer to:

• N-Acetylserotonin, also known as normelatonin, a neurotransmitter
• Neonatal abstinence syndrome, a drug withdrawal syndrome found in infants that have been administered drugs
• Nerve attenuation syndrome, a fictional disease in the movie Johnny Mnemonic that slowly paralyzes the victim's nervous system
• Normative Aging Study, a long-term study of the health effects of aging