NJ is the abbreviation for the U.S. state of New Jersey.

Nj or NJ may also stand for:

Places[edit]

• Narva-Jõesuu, Estonia
• Nanjing, Jiangsu, China

Science and technology[edit]

• Nanojoule (nJ), an International System of Units (SI) unit of energy equal to 10⁻⁹ joules
• Neighbor joining, a bioinformatic method for the construction of phylogenetic trees

Other uses[edit]

• Nj (digraph), a Latin-script digraph
• Nippon Jamboree
• Nordjyske Jernbaner, a Danish railway
• Napierville Junction Railway
• NJ.com, a news website

See also[edit]

• Nje, a letter of the Cyrillic script