RG, Rg or rg may refer to:

• Pete RG (fl. 1998–2015), an American singer-songwriter
• Razor Ramon RG or Makoto Izubuchi (born 1974), a Japanese professional wrestler
• RG Sharma (born 1987), an Indian international cricketer
• RG Snyman (born 1995), South African rugby union player

• RG postcode area, the postal address for the area of Reading and surrounding towns in England
• Province of Ragusa, Sicily, Italy, vehicle registration prefix

• Radio Guide, used to specify Coaxial cables (including a list of RG cable types)
• ReplayGain, a proposed standard for normalizing the perceived loudness of digital audio playback
• ResearchGate, a social network for scientists and researchers

• RG-6 grenade launcher, a Russian weapon
• RG-42, a Russian fragmentation grenade
• armored vehicles designed by Land Systems OMC, South Africa (including a list of RG-type vehicles)

• RG, or Rail Gourmet, a food brand and a division of SSP Group
• Radius of gyration, several related measures of the size of an object, a surface, or an ensemble of points
• Reachability Graph, a formal verification technique
• Renormalization group, in physics, a mathematical apparatus allowing investigation of a system at different size scales
• Research group, at universities or research centers, research groups are commonly abbreviated this way.
• RG color space, a color space
  • rg chromaticity, a two-dimensional color space in which there is no intensity information
• Rhamnogalacturonans, a type of pectin
• Roentgenium, symbol Rg, a chemical element

• RG Heidelberg, a rugby union club from Heidelberg, Germany
• Rhythmic gymnastics
• Right guard, a position in American football

• Direction centrale des renseignements généraux or Renseignements Généraux, a defunct French interior intelligence agency
• Ibanez RG, a series of electric guitars produced by Hoshino Gakki
• r > g, an economics equation fundamental to Capital in the Twenty-First Century
• Regional Gathering, an event hosted by local chapters of American Mensa
• RG Financial Corporation, a financial holding company located in San Juan, Puerto Rico
• RG Line, a Finnish shipping company
• RG Veda, a Japanese manga first published in 1989
• Race Gurram, 2014 Indian film abbreviated as RG
• Röhm Gesellschaft or RG, a German brand of firearms (including a list of RG-type models)
• Rossiyskaya Gazeta, a Russian newspaper
• Varig (1927–2006), Brazilian airline (IATA code RG)
• A RG (roof garden) level in a building, also called Lower Penthouse (LPH) or a level where there is a rooftop garden in some buildings
• ripgrep, a command line file-finding tool with command name "rg"

• RG1 (disambiguation)
• RG2 (disambiguation)
• RG3 (disambiguation)
• R&G (disambiguation)
• Rio Grande (disambiguation)

This disambiguation page lists articles associated with the title RG.
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