ORF may refer to:

• Österreichischer Rundfunk, Austria's national public-service broadcaster
• An open reading frame
• The IATA airport code for Norfolk International Airport in Norfolk, Virginia
• An acronym for 'Open Relay Filter', which is an email anti-spam function. An Example of this software is 'ORF Enterprise Edition' by Vamsoft^*. See article Open_mail_relay for more information on open relays.