J26 may refer to:
Roads County Route J26 (California) Johor State Route J26 in Malaysia
Vehicles GSR Class J26, an Irish steam locomotive LNER Class J26, a British steam locomotive class North American J 26 Mustang, an American fighter aircraft in service with the Swedish Air Force
Other uses Gyrobifastigium, a Johnson solid (J26) J26 G8 Protests, held in Calgary, Alberta in June 2002 Small nucleolar RNA J26