RFD

RFD is an abbreviation that can refer to:

* Rural Free Delivery, the postal system to rural areas started in the Great Depression
* Rally of Democratic Forces ("Regroupement des Forces Démocratiques"), a political party in Mauritania
* Radio frequency (device/detector/distribution), one of several acronyms
* Mayberry R.F.D., a CBS television sitcom
* Chicago Rockford International Airport (IATA airport code: RFD), an airport in northern Illinois
* RFD (magazine), a magazine for rural gay men
* Recency Frequency Duration, a modified version on the RFM analysis
* The RFD Boys, a bluegrass band from Ann Arbor, Michigan
* Rear flank downdraft, an area of quickly descending air associated with strong thunderstorms
* Registered Firearms Dealer (United Kingdom)
* RFD-TV, a television network
* Reserve Force Decoration, an Australian Military Award
* Railfreight Distribution, an old UK freight company

RfD is an abbreviation that can refer to:
* Request for Discussion, a Usenet formal process for making changes
* Reference dose, the United States Environmental Protection Agency's maximum acceptable oral dose of a toxic substance