RBY

RBY may refer to:

Aeronautics

 * Ruby Airport (IATA code RBY), a public-use airport in Ruby, Alaska
 * Vision Airlines (ICAO code RBY), a defunct American airline

Military

 * Royal Buckinghamshire Yeomanry, a British Army squadron
 * RBY MK 1, an Israeli light armored reconnaissance vehicle

Other uses

 * RYB color model
 * R. B. Y. Scott (1899–1987), a Canadian minister and Old Testament scholar
 * Roman Bravo-Young (born 1999), an American freestyle and folkstyle wrestler
 * Pokémon Red, Blue, and Yellow, first games of the Pokémon series
 * Rby., standard RHS abbreviation for the orchid nothogenus Rhynchobrassoleya (= Brassavola × Cattleya × Rhyncholaelia), see × Brassolaeliocattleya