RFS may refer to:
Companies and organizations Radio Frequency Systems, a telecommunications company New South Wales Rural Fire Service, a volunteer-based firefighting agency in New South Wales, Australia Royal Forestry Society, a charitable organisation established in 1882 in Northumberland, England Riordan, Freeman & Spogli, a private equity firm today known as Freeman Spogli & Co. Rossijskij Futbol'nyj Soyuz or Russian Football Union, the governing body of football in Russia
Computing Receive flow steering, a scaling technique for network traffic processing ReiserFS, a general-purpose, journaled computer file system Remote File System, a distributed file system developed by AT&T in the 1980
Other uses Renewable Fuel Standard (United States), a US federal program The Review of Financial Studies, an academic journal Russian Federation Ship, an occasionally applied exonymical ship prefix for the Russian Navy that is not used by it officially Registered Financial Specialist, a Graduate Post Nominal designation at the American Academy of Financial Management Regardless of Feature Size, a term used in geometric dimensioning and tolerancing FK RFS, a Latvian professional association football club Rīgas futbola skola (RFS), a Latvian association football academy and youth club, operated by the Riga City Council and unrelated to FK RFS