NLX

NLX may refer to:


 * ISO 639-3 code for the Kalto language
 * nanolux, an SI unit of illumination equal to 10−9 lux
 * NLX (motherboard form factor), a form factor standard for low profile retail PCs
 * NLX LLC, a software company acquired by Rockwell Collins in 2003
 * Nonlinear X-wave, a multi-dimensional wave that can travel without distortion
 * Northern Lights Express, a proposed passenger rail service between Minneapolis and Duluth, Minnesota
 * Railroad reporting mark for Allied Corporation from 1963 - 1985