EWI may refer to:

• EWI (musical instrument), an electric wind instrument
• EastWest Institute, an American think tank
• Edison Welding Institute, in Ohio, United States
• Enarotali Airport, in Indonesia
• Energiewirtschaftliches Institut, an economics research institute at the University of Cologne
• Expert Witness Institute
• External wall insulation

• Mogo Riga
• Mogororo
• Mogorović family
• Mogorović (nobility)
• Mogorović noble family
• Mogorče
• Mogosoaia (disambiguation)
• Mogos River (Ismar)
• Mogos Shumay
• Mogosu River
• Mogot
• Mogote, Colorado
• Mogotlane, David
• Mogotsi, Steve
• Mogovidite
• Mogoytuy, Mogoytuysky District, Zabaykalsky Krai
• Mogoytuysky Municipal District
• Mogpog, Marinduque
• Mogra Kalan
• Mogra kalan
• Mogra Union
• Mogra Village
• Mogrelia, Andrew
• Mogren
• Mogridge