J6

J6 may refer to:

• Joint Staff J-6, a directorate of the US Department of Defense
• Junkers J 6, a German fighter aircraft
• Shenyang J-6, Chinese version of Soviet MiG-19 jet fighter
• J6 Jaktfalken, a Swedish fighter aircraft
• HMS J6, a World War I UK submarine sunk in a friendly fire incident
• HMS Alresford, a UK minesweeper, pennant number J06

• J6, an abbreviation for the January 6 United States Capitol attack of 2021
  • J6 Committee, The United States House Select Committee on the January 6 Attack
  • J6 hearings – Public hearings of the United States House Select Committee on the January 6 Attack
  • Justice for J6 rally, related event

• ATC code J06 Immune sera and immunoglobulins, a subgroup of the Anatomical Therapeutic Chemical Classification System
• J06, one of the ICD-10 upper respiratory tract infection codes (J00-06)
• MGWR Class J6, successor to the MGWR Class H steam locomotive
• LNER Class J6, a class of British steam locomotives
• Pentagonal rotunda, a Johnson solid in geometry
• Samsung Galaxy J6, an Android mobile phone

• J6, the ITU prefix for the island country of Saint Lucia
• Judgement Six (J6), an evil organization from the video game series Virtua Fighter

• 6J (disambiguation)