Specialist frequently refers to an expert in a profession. It can also mean:

• Specialist (rank), a military rank
• Specialist degree, in academia
• "Specialist", a song by the band Interpol
• "The Specialist", the English translation of "Lo Sconosciuto", an Italian comics character
• Generalist and specialist species, a method of species categorization
• A market maker in a stock exchange
• Medical specialist, someone who specializes in a particular field of medicine
• Payload Specialist, a Space Shuttle crew member selected for a single specific mission
• The Specialist, a 1994 action film
• Specialist, a military avionics expert, commonly referred to as "Wizard" or "Pointy Heads" by their crew chief counter parts.