NPO Radio 4 is a public-service radio channel in the Netherlands, broadcasting chiefly classical music. It is part of the Netherlands Public Broadcasting system, NPO.
The channel began broadcasting on 28 December 1975 under the name Hilversum 4, changed to Radio 4 on 1 December 1985. Its first programme was produced by the Veronica broadcasting association (VOO).
The following broadcasting associations and organisations currently provide programming on NPO Radio 4: AVRO, EO, KRO, MAX, NCRV, NTR, RKK, TROS, VARA, VPRO.
Initially, the channel broadcast only during the evenings but it now operates around the clock, providing surround sound transmissions via the internet and satellite.
On 19 August 2014 the station's name and logo were amended to include mention of its parent broadcasting organization, NPO.
Former Radio 4 logo used until August 2014