Koka or Kōka may refer to:

• Ahmed Hassan Mahgoub, an Egyptian football player known as Koka.
• Kōka, a Japanese era name
• Kōka, Shiga, Japan, a city created in 2004
  • Kōka, Shiga (town), Japan (dissolved and replaced by the city)
  • Kōka District, Shiga, Japan (dissolved and replaced by the city)
• Kōka (効果), a type of award point in the judo rules
• Kóka, a village in Hungary
• Koka, Eritrea, a community in Eritrea
• USS Koka, U.S. Navy ships
• Koka (brand), a brand of instant noodles
• Koka Reservoir, a man-made lake in Ethiopia
• Rock-cut tombs
• Koka Subba Rao, Chief Justice of Supreme Court of India
• KOKA, a radio station serving the Shreveport-Bossier City metropolitan area
• Klava Koka, a Russian singer born 1996

• Koga (disambiguation) – The Japanese place name Kōka is alternatively pronounced Kōga
• Coka (disambiguation)
• Coca (disambiguation)