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
See also Neilsen (disambiguation) Neilson (disambiguation) Nielson Nilsen Nilsson