Nielsen

Nielsen may refer to:

Business

 * Nielsen Gallery, an American commercial art gallery
 * Nielsen Holdings, global information, data, and measurement company
 * Nielsen Corporation, a marketing research firm
 * Nielsen Audio, formerly Arbitron, which measures radio listenership
 * Nielsen Broadcast Data Systems, a service also known as BDS that tracks monitored radio, television, and internet airplay of songs
 * Nielsen Media Research, the company that creates the Nielsen ratings
 * Nielsen ratings, a rating system used to gauge audience measurement of television programming habits in the United States
 * Nielsen Norman Group, a computer user interface and user experience consulting firm

Other uses

 * Nielsen (surname), including a list of people
 * Nielsen (crater), a lunar impact crater on the Oceanus Procellarum
 * Nielsen–Olesen vortex, a point-like object localized in two spatial dimensions or a classical solution of field theory with the same property
 * Nielsen fixed-point theorem
 * Nielsen Fjord
 * Nielsen Glacier
 * Nielsen Park She-Oak