MK4 may refer to:

• Mortal Kombat 4, video game
• Menatetrenone, vitamin K₂
• The fourth game in the Mario Kart series, Double Dash!!.

• Baghran, AF
• Baghran, Afghanistan
• Baghrās
• Baghsar
• Baghsar lake
• Bagh Shomal Stadium
• Baghtel
• Bag, Hungary
• Baghwala Mohra
• Baghwan
• Baghwanan
• Baghwani
• Bagh (word)
• Baghèt
• Bagiata
• Bagicha Singh Minhas
• Bagicz
• Bagi (disambiguation)
• Bagielnica
• Bagienica
• Bagienice
• Bagienice (disambiguation)
• Bagienice Duze
• Bagienice Duże
• Bagienice-Folwark