CNJ can refer to:

• The National Justice Council of Brazil
• Central Railroad of New Jersey
• Central Railroad of New Jersey 113
• The College of New Jersey, commonly abbreviated as TCNJ or CNJ.
• Camden New Journal, a free newspaper in the London Borough of Camden
• Chick'n Joy, a fastfood restaurant
• Chun Nan Jun, a Chinese auto manufacturer

• Twenty-four Filial Exemplars
• Twenty-four-hour affair
• Twenty-four hour news channels
• Twenty-Four Hours from Tulsa
• Twenty-Four Hours in the Life of a Woman
• Twenty-Four Hours in the Life of a Woman (disambiguation)
• Twenty-four kohanic gifts
• Twenty-four Parganas
• TwentyFourSeven
• Twenty Four Seven (album)
• Twenty-fourth Amendment of the Constitution of India
• Twenty-fourth century
• Twenty-fourth century BC
• Twenty-fourth dynasty of Egypt
• Twenty-fourth Level
• Twenty-fourth level (novel)
• Twenty-Fourth State
• Twenty-fourth State
• Twenty Girls and the Teachers
• Twenty Hours
• Twenty Houses of the Zodiac
• Twenty (Jebediah album)
• Twenty Klicks
• Twenty Klicks (NCIS)
• Twenty Lake