Marec may refer to:

• MAREC, a patent information query tool
• Michigan Alternative and Renewable Energy Center
• Pierre Marec (1759–1828), a French lawyer
• Marec, Belgian caricaturist for Dag Allemaal
• Marec, a populated place in Kosovo

• Bayartsogt Munkhzaya
• Bayartsogt Munkhzayaa
• Bayartsogtyn Mönkhzayaa
• Bayaryn Yesüi
• Bayarán
• Bayat dynasty
• Bayat e Esfahan
• Bayat e Kurd
• Bayat e Turk
• Bayaut (disambiguation)
• Bay Auxiliary Field
• Bayawak
• Baya wine
• Bayazid Khan
• Bayazit I
• Bayazit Yildirim
• Baybars al-Jashnakir
• Baybars al-Mansuri
• Baybars al-Mansuri al-Dawadar
• Baybars Bridge
• Baybayin (Unicode block)
• Baybay language
• Bay bean
• Baybek
• Bayberry agrilus