The National Readership Survey was a joint venture company in the United Kingdom (UK) between the Institute of Practitioners in Advertising (IPA), the Newspaper Publishers Association (NPA) and the Periodical Publishers Association (PPA).
It provided audience research for print advertising trading in the UK.
The survey covered over 250 of Britain's major newspapers and magazines, showing the size and nature of the audiences they reached.
It classified audiences in a number of ways; one such classification was the NRS social grade.
The National Readership Survey was founded in 1956 by the Institute of Practitioners in Advertising.