NJ (disambiguation)

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

Nj or NJ may also stand for:

Places

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

Science and technology

 * 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

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