SHODAN (Sentient Hyper-Optimized Data Access Network) is a fictional artificial intelligence and the main antagonist of the cyberpunk-horror themed action role-playing video games System Shock and System Shock 2.

Shodan may refer to:

• Shodan (rank), the term of rank used in Japanese martial arts and the game of Go
• SHODAN, the antagonist of the System Shock games
• Shodan (website), a search engine named after the game character
• Villa Shodhan, a building in Ahmedabad, Gujarat, India